Catalogo CVE

CVE-2026-77756

Inconsistent Interpretation of HTTP Requests ('HTTP…

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat caused by processing the transfer-encoding header for an HTTP/1.0 request may allow an attacker to cause one request from another user to fail when Tomcat is located behind a reverse proxy. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.47 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.67 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.

Gravità: Medium · CVSS 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Published: Sep 16, 2026, 3:12:00 PM UTC
Updated: Sep 23, 2026, 2:17:08 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.53% · Oct 27, 2026

Projects and upstream resources

[tomcat10][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / release	Package	Version	Status	Source
Debiantrixie	tomcat9	`9.0.70-2`	FixedDistribution-reported fixed boundary	[CVE-2026-77756]
Debiantrixie	tomcat9	`9.0.95-1`	Fixed	[CVE-2026-77756]
Debiansid	tomcat10	`10.1.60-1`	FixedDistribution-reported fixed boundary	[CVE-2026-77756]
Debiansid	tomcat9	`9.0.122-1`	Fixed	[CVE-2026-77756]
Debiansid	tomcat9	`9.0.70-2`	FixedDistribution-reported fixed boundary	[CVE-2026-77756]
Debianforky	tomcat10	`10.1.60-1`	FixedDistribution-reported fixed boundary	[CVE-2026-77756]
Debianforky	tomcat9	`9.0.122-1`	Fixed	[CVE-2026-77756]
Debianforky	tomcat9	`9.0.70-2`	FixedDistribution-reported fixed boundary	[CVE-2026-77756]
Debianbookworm	tomcat9	`9.0.70-2`	FixedDistribution-reported fixed boundary	[CVE-2026-77756]

Showing 9 fix observations. All 15 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
Debianbookworm	tomcat10	Not reported	AffectedDistribution reports no fix	[CVE-2026-77756]
Debianbookworm	tomcat10	`10.1.55-1~deb12u1`	Affected	[CVE-2026-77756]
Debianbookworm	tomcat9	`9.0.70-2`	FixedDistribution-reported fixed boundary	[CVE-2026-77756]
Debianbookworm-security	tomcat10	`10.1.55-1~deb12u1`	Affected	[CVE-2026-77756]
Debianforky	tomcat10	`10.1.60-1`	FixedDistribution-reported fixed boundary	[CVE-2026-77756]
Debianforky	tomcat9	`9.0.122-1`	Fixed	[CVE-2026-77756]
Debianforky	tomcat9	`9.0.70-2`	FixedDistribution-reported fixed boundary	[CVE-2026-77756]
Debiansid	tomcat10	`10.1.60-1`	FixedDistribution-reported fixed boundary	[CVE-2026-77756]
Debiansid	tomcat9	`9.0.122-1`	Fixed	[CVE-2026-77756]
Debiansid	tomcat9	`9.0.70-2`	FixedDistribution-reported fixed boundary	[CVE-2026-77756]
Debiantrixie	tomcat10	Not reported	AffectedDistribution reports no fix	[CVE-2026-77756]
Debiantrixie	tomcat10	`10.1.55-1~deb13u1`	Affected	[CVE-2026-77756]
Debiantrixie	tomcat9	`9.0.70-2`	FixedDistribution-reported fixed boundary	[CVE-2026-77756]
Debiantrixie	tomcat9	`9.0.95-1`	Fixed	[CVE-2026-77756]
Debiantrixie-security	tomcat10	`10.1.55-1~deb13u1`	Affected	[CVE-2026-77756]

Original provider fields

{
  "package_releases": [
    {
      "name": "tomcat9",
      "status": "fixed",
      "release": "sid",
      "version": "9.0.122-1"
    },
    {
      "name": "tomcat9",
      "status": "fixed",
      "release": "forky",
      "version": "9.0.122-1"
    },
    {
      "name": "tomcat9",
      "status": "fixed",
      "release": "trixie",
      "version": "9.0.95-1"
    },
    {
      "name": "tomcat9",
      "status": "fixed",
      "release": "bookworm",
      "version": "9.0.70-2"
    },
    {
      "name": "tomcat10",
      "status": "fixed",
      "release": "sid",
      "version": "10.1.60-1"
    },
    {
      "name": "tomcat10",
      "status": "fixed",
      "release": "forky",
      "version": "10.1.60-1"
    },
    {
      "name": "tomcat10",
      "status": "vulnerable",
      "release": "trixie",
      "version": "10.1.55-1~deb13u1"
    },
    {
      "name": "tomcat10",
      "status": "vulnerable",
      "release": "trixie-security",
      "version": "10.1.55-1~deb13u1"
    },
    {
      "name": "tomcat10",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "10.1.55-1~deb12u1"
    },
    {
      "name": "tomcat10",
      "status": "vulnerable",
      "release": "bookworm-security",
      "version": "10.1.55-1~deb12u1"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "tomcat9",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "9.0.70-2"
    },
    {
      "bug": null,
      "name": "tomcat9",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "9.0.70-2"
    },
    {
      "bug": null,
      "name": "tomcat9",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "9.0.70-2"
    },
    {
      "bug": null,
      "name": "tomcat9",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "9.0.70-2"
    },
    {
      "bug": null,
      "name": "tomcat10",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "10.1.60-1"
    },
    {
      "bug": null,
      "name": "tomcat10",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "10.1.60-1"
    },
    {
      "bug": null,
      "name": "tomcat10",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": null,
      "name": "tomcat10",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": []
}

OpenFactory catalog packages

L’associazione dei pacchetti è in corso.

[Debian 12 (Bookworm)]

[libtomcat10-embed-java]Sconosciuto
Pacchetto sorgente: [tomcat10]
Dettagli (6)
- 10.1.55-1~deb12u1 · all · bookworm
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
[libtomcat10-java]Sconosciuto
Pacchetto sorgente: [tomcat10]
Dettagli (6)
- 10.1.55-1~deb12u1 · all · bookworm
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
[libtomcat9-java]Sconosciuto
Pacchetto sorgente: [tomcat9]
Dettagli (2)
- 9.0.70-2 · all · bookworm
  Corretta · Corretta: 9.0.70-2
  nvd · tomcat9 · debian · bookworm; nvd · tomcat9 · debian · 12
- 9.0.70-2 · all · bookworm
  Corretta · Corretta: 9.0.70-2
  nvd · tomcat9 · debian · bookworm; nvd · tomcat9 · debian · 12
[tomcat10]Sconosciuto
Dettagli (6)
- 10.1.55-1~deb12u1 · all · bookworm
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
[tomcat10-admin]Sconosciuto
Pacchetto sorgente: [tomcat10]
Dettagli (6)
- 10.1.55-1~deb12u1 · all · bookworm
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
[tomcat10-common]Sconosciuto
Pacchetto sorgente: [tomcat10]
Dettagli (6)
- 10.1.55-1~deb12u1 · all · bookworm
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
[tomcat10-docs]Sconosciuto
Pacchetto sorgente: [tomcat10]
Dettagli (6)
- 10.1.55-1~deb12u1 · all · bookworm
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
[tomcat10-examples]Sconosciuto
Pacchetto sorgente: [tomcat10]
Dettagli (6)
- 10.1.55-1~deb12u1 · all · bookworm
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
[tomcat10-user]Sconosciuto
Pacchetto sorgente: [tomcat10]
Dettagli (6)
- 10.1.55-1~deb12u1 · all · bookworm
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.40-1~bpo12+1 · all · bookworm-backports
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12
- 10.1.55-1~deb12u1 · all · bookworm-security
  Interessata
  nvd · tomcat10 · debian · bookworm; nvd · tomcat10 · debian · 12

[Debian 13 (Trixie)]

[libtomcat10-embed-java]Sconosciuto
Pacchetto sorgente: [tomcat10]
Dettagli (4)
- 10.1.55-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat10 · debian · 13
[libtomcat10-java]Sconosciuto
Pacchetto sorgente: [tomcat10]
Dettagli (4)
- 10.1.55-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat10 · debian · 13
[libtomcat11-embed-java]Sconosciuto
Pacchetto sorgente: [tomcat11]
Dettagli (4)
- 11.0.22-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat11 · debian · 13
- 11.0.22-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat11 · debian · 13
- 11.0.22-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat11 · debian · 13
- 11.0.22-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat11 · debian · 13
[libtomcat11-java]Sconosciuto
Pacchetto sorgente: [tomcat11]
Dettagli (4)
- 11.0.22-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat11 · debian · 13
- 11.0.22-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat11 · debian · 13
- 11.0.22-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat11 · debian · 13
- 11.0.22-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat11 · debian · 13
[libtomcat9-java]Sconosciuto
Pacchetto sorgente: [tomcat9]
Dettagli (2)
- 9.0.95-1 · all · trixie
  Corretta · Corretta: 9.0.70-2
  nvd · tomcat9 · debian · 13
- 9.0.95-1 · all · trixie
  Corretta · Corretta: 9.0.70-2
  nvd · tomcat9 · debian · 13
[tomcat10]Sconosciuto
Dettagli (4)
- 10.1.55-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat10 · debian · 13
[tomcat10-admin]Sconosciuto
Pacchetto sorgente: [tomcat10]
Dettagli (4)
- 10.1.55-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat10 · debian · 13
[tomcat10-common]Sconosciuto
Pacchetto sorgente: [tomcat10]
Dettagli (4)
- 10.1.55-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat10 · debian · 13
[tomcat10-docs]Sconosciuto
Pacchetto sorgente: [tomcat10]
Dettagli (4)
- 10.1.55-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat10 · debian · 13
[tomcat10-examples]Sconosciuto
Pacchetto sorgente: [tomcat10]
Dettagli (4)
- 10.1.55-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat10 · debian · 13
[tomcat10-user]Sconosciuto
Pacchetto sorgente: [tomcat10]
Dettagli (4)
- 10.1.55-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat10 · debian · 13
- 10.1.55-1~deb13u1 · all · trixie-security
  Interessata
  nvd · tomcat10 · debian · 13

Altri risultati

Osservato: Oct 27, 2026, 6:14:09 AM UTC

Riferimenti

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]