Catálogo de CVE

CVE-2026-34519

AIOHTTP is an asynchronous HTTP client/server…

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, an attacker who controls the reason parameter when creating a Response may be able to inject extra headers or similar exploits. This issue has been patched in version 3.13.4.

Gravidade: Medium · CVSS 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Published: Apr 1, 2026, 8:26:25 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.29% · Oct 27, 2026

Projects and upstream resources

[python-aiohttp][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
Debiansid	python-aiohttp	`3.13.5-1`	FixedDistribution-reported fixed boundary	[CVE-2026-34519]
Debiansid	python-aiohttp	`3.14.3-1`	Fixed	[CVE-2026-34519]
Debianforky	python-aiohttp	`3.13.5-1`	FixedDistribution-reported fixed boundary	[CVE-2026-34519]
Debianforky	python-aiohttp	`3.14.3-1`	Fixed	[CVE-2026-34519]

Showing 4 fix observations. All 13 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
PyPIRelease not reported	aiohttp	`3.13.4`	UnknownSource applicability is not established	[GHSA-MWH4-6H8G-PG8W]Sep 10, 2026, 3:50:44 AM UTC
UnknownRelease not reported	aiohttp	`3.13.4`	UnknownSource applicability is not established	Provider not reported
UnknownRelease not reported	python-aiohttp	Not reported	UnknownSource applicability is not established	Provider not reported
Debianbookworm	python-aiohttp	Not reported	AffectedDistribution reports no fix	[CVE-2026-34519]
Debianbookworm	python-aiohttp	`3.8.4-1+deb12u1`	Affected	[CVE-2026-34519]
Debianbookworm-security	python-aiohttp	`3.8.4-1+deb12u1`	Affected	[CVE-2026-34519]
Debianforky	python-aiohttp	`3.13.5-1`	FixedDistribution-reported fixed boundary	[CVE-2026-34519]
Debianforky	python-aiohttp	`3.14.3-1`	Fixed	[CVE-2026-34519]
Debiansid	python-aiohttp	`3.13.5-1`	FixedDistribution-reported fixed boundary	[CVE-2026-34519]
Debiansid	python-aiohttp	`3.14.3-1`	Fixed	[CVE-2026-34519]
Debiantrixie	python-aiohttp	Not reported	AffectedDistribution reports no fix	[CVE-2026-34519]
Debiantrixie	python-aiohttp	`3.11.16-1+deb13u1`	Affected	[CVE-2026-34519]
Debiantrixie-security	python-aiohttp	`3.11.16-1+deb13u1`	Affected	[CVE-2026-34519]

Original provider fields

{
  "package_releases": [
    {
      "name": "python-aiohttp",
      "status": "fixed",
      "release": "sid",
      "version": "3.14.3-1"
    },
    {
      "name": "python-aiohttp",
      "status": "fixed",
      "release": "forky",
      "version": "3.14.3-1"
    },
    {
      "name": "python-aiohttp",
      "status": "vulnerable",
      "release": "trixie",
      "version": "3.11.16-1+deb13u1"
    },
    {
      "name": "python-aiohttp",
      "status": "vulnerable",
      "release": "trixie-security",
      "version": "3.11.16-1+deb13u1"
    },
    {
      "name": "python-aiohttp",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "3.8.4-1+deb12u1"
    },
    {
      "name": "python-aiohttp",
      "status": "vulnerable",
      "release": "bookworm-security",
      "version": "3.8.4-1+deb12u1"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1132582,
      "name": "python-aiohttp",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "3.13.5-1"
    },
    {
      "bug": 1132582,
      "name": "python-aiohttp",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "3.13.5-1"
    },
    {
      "bug": 1132582,
      "name": "python-aiohttp",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1132582,
      "name": "python-aiohttp",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": [
    {
      "name": "python-aiohttp",
      "fixed_version": "not yet fixed",
      "applicability_unknown": true
    },
    {
      "name": "aiohttp",
      "fixed_version": "3.13.4",
      "applicability_unknown": true
    },
    {
      "name": "aiohttp",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.13.4"
            }
          ]
        }
      ],
      "ecosystem": "PyPI",
      "provider_url": "https://osv.dev/vulnerability/GHSA-mwh4-6h8g-pg8w",
      "fixed_version": "3.13.4",
      "provider_source": "pypi",
      "provider_record_id": "GHSA-MWH4-6H8G-PG8W",
      "provider_updated_at": "2026-09-10T03:50:44.819886754Z",
      "applicability_unknown": true
    },
    {
      "name": "aiohttp",
      "ranges": [
        {
          "fixed": "3.13.4",
          "introduced": "",
          "last_affected": "",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "provider_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34519",
      "fixed_version": "3.13.4",
      "provider_source": "nvd",
      "provider_record_id": "NVD-CVE-2026-34519",
      "provider_updated_at": "2026-10-26T21:10:00.170"
    }
  ]
}

[Debian bug #1132582]

Publisher notes

[trixie] python-aiohttp: Minor issue

OpenFactory catalog packages

A associação de pacotes está em andamento.

[Debian 12 (Bookworm)]

[python3-aiohttp]Desconhecido
Pacote fonte: [python-aiohttp]
Detalhes (4)
- 3.8.4-1+deb12u1 · amd64 · bookworm
  Afetada
  nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
- 3.8.4-1+deb12u1 · arm64 · bookworm
  Afetada
  nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
- 3.8.4-1+deb12u1 · amd64 · bookworm-security
  Afetada
  nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
- 3.8.4-1+deb12u1 · arm64 · bookworm-security
  Afetada
  nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
[python-aiohttp-doc]Desconhecido
Pacote fonte: [python-aiohttp]
Detalhes (4)
- 3.8.4-1+deb12u1 · all · bookworm
  Afetada
  nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
- 3.8.4-1+deb12u1 · all · bookworm
  Afetada
  nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
- 3.8.4-1+deb12u1 · all · bookworm-security
  Afetada
  nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12
- 3.8.4-1+deb12u1 · all · bookworm-security
  Afetada
  nvd · python-aiohttp · debian · bookworm; nvd · python-aiohttp · debian · 12

[Debian 13 (Trixie)]

[python3-aiohttp]Desconhecido
Pacote fonte: [python-aiohttp]
Detalhes (4)
- 3.11.16-1+deb13u1 · amd64 · trixie
  Afetada
  nvd · python-aiohttp · debian · 13
- 3.11.16-1+deb13u1 · arm64 · trixie
  Afetada
  nvd · python-aiohttp · debian · 13
- 3.11.16-1+deb13u1 · amd64 · trixie-security
  Afetada
  nvd · python-aiohttp · debian · 13
- 3.11.16-1+deb13u1 · arm64 · trixie-security
  Afetada
  nvd · python-aiohttp · debian · 13
[python-aiohttp-doc]Desconhecido
Pacote fonte: [python-aiohttp]
Detalhes (4)
- 3.11.16-1+deb13u1 · all · trixie
  Afetada
  nvd · python-aiohttp · debian · 13
- 3.11.16-1+deb13u1 · all · trixie
  Afetada
  nvd · python-aiohttp · debian · 13
- 3.11.16-1+deb13u1 · all · trixie-security
  Afetada
  nvd · python-aiohttp · debian · 13
- 3.11.16-1+deb13u1 · all · trixie-security
  Afetada
  nvd · python-aiohttp · debian · 13

Observado: Oct 27, 2026, 8:00:39 AM UTC

Referências

[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]