Catálogo de CVE

CVE-2026-40194

phpseclib is a PHP secure communications library…

phpseclib is a PHP secure communications library. Starting in 0.1.1 and prior to 3.0.51, 2.0.53, and 1.0.28, phpseclib\Net\SSH2::get_binary_packet() uses PHP's != operator to compare a received SSH packet HMAC against the locally computed HMAC. != on equal-length binary strings in PHP uses memcmp(), which short-circuits on the first differing byte. This is a real variable-time comparison (CWE-208), proven by scaling benchmarks. This vulnerability is fixed in 3.0.51, 2.0.53, and 1.0.28.

Gravidade: High · CVSS 8.2
Published: Dec 18, 2023, 7:22:09 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.36% · Oct 27, 2026

Projects and upstream resources

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	php-phpseclib	`2.0.48-3+deb13u2`	FixedDistribution-reported fixed boundary	[CVE-2026-40194]
Debiantrixie	php-phpseclib	`2.0.48-3+deb13u3`	Fixed	[CVE-2026-40194]
Debiantrixie	php-phpseclib3	`3.0.43-2+deb13u2`	FixedDistribution-reported fixed boundary	[CVE-2026-40194]
Debiantrixie	php-phpseclib3	`3.0.43-2+deb13u3`	Fixed	[CVE-2026-40194]
Debiantrixie	phpseclib	`1.0.23-6+deb13u2`	FixedDistribution-reported fixed boundary	[CVE-2026-40194]
Debiantrixie	phpseclib	`1.0.23-6+deb13u3`	Fixed	[CVE-2026-40194]
Debiansid	php-phpseclib	`2.0.53-1`	FixedDistribution-reported fixed boundary	[CVE-2026-40194]
Debiansid	php-phpseclib	`2.0.55-1`	Fixed	[CVE-2026-40194]
Debiansid	php-phpseclib3	`3.0.51-1`	FixedDistribution-reported fixed boundary	[CVE-2026-40194]
Debiansid	php-phpseclib3	`3.0.57-1`	Fixed	[CVE-2026-40194]
Debiansid	phpseclib	`1.0.28-1`	FixedDistribution-reported fixed boundary	[CVE-2026-40194]
Debiansid	phpseclib	`1.0.30-1`	Fixed	[CVE-2026-40194]

Showing 12 fix observations. All 32 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
UnknownRelease not reported	phpseclib	Not reported	UnknownSource applicability is not established	Provider not reported
UnknownRelease not reported	phpseclib	`2.0.53`	UnknownSource applicability is not established	Provider not reported
UnknownRelease not reported	phpseclib	`3.0.51`	UnknownSource applicability is not established	Provider not reported
Debianbookworm	php-phpseclib	`2.0.42-1+deb12u4`	FixedDistribution-reported fixed boundary	[CVE-2026-40194]
Debianbookworm	php-phpseclib	`2.0.42-1+deb12u5`	Fixed	[CVE-2026-40194]
Debianbookworm	php-phpseclib3	`3.0.19-1+deb12u5`	FixedDistribution-reported fixed boundary	[CVE-2026-40194]
Debianbookworm	php-phpseclib3	`3.0.19-1+deb12u6`	Fixed	[CVE-2026-40194]
Debianbookworm	phpseclib	`1.0.20-1+deb12u4`	FixedDistribution-reported fixed boundary	[CVE-2026-40194]
Debianbookworm	phpseclib	`1.0.20-1+deb12u5`	Fixed	[CVE-2026-40194]
Debianbookworm-security	php-phpseclib	`2.0.42-1+deb12u3`	Affected	[CVE-2026-40194]
Debianbookworm-security	php-phpseclib3	`3.0.19-1+deb12u4`	Affected	[CVE-2026-40194]
Debianbookworm-security	phpseclib	`1.0.20-1+deb12u3`	Affected	[CVE-2026-40194]
Debianforky	php-phpseclib	`2.0.53-1`	FixedDistribution-reported fixed boundary	[CVE-2026-40194]
Debianforky	php-phpseclib	`2.0.55-1`	Fixed	[CVE-2026-40194]
Debianforky	php-phpseclib3	`3.0.51-1`	FixedDistribution-reported fixed boundary	[CVE-2026-40194]
Debianforky	php-phpseclib3	`3.0.57-1`	Fixed	[CVE-2026-40194]
Debiansid	php-phpseclib	`2.0.53-1`	FixedDistribution-reported fixed boundary	[CVE-2026-40194]
Debiansid	php-phpseclib	`2.0.55-1`	Fixed	[CVE-2026-40194]
Debiansid	php-phpseclib3	`3.0.51-1`	FixedDistribution-reported fixed boundary	[CVE-2026-40194]
Debiansid	php-phpseclib3	`3.0.57-1`	Fixed	[CVE-2026-40194]
Debiansid	phpseclib	`1.0.28-1`	FixedDistribution-reported fixed boundary	[CVE-2026-40194]
Debiansid	phpseclib	`1.0.30-1`	Fixed	[CVE-2026-40194]
Debiantrixie	php-phpseclib	`2.0.48-3+deb13u2`	FixedDistribution-reported fixed boundary	[CVE-2026-40194]
Debiantrixie	php-phpseclib	`2.0.48-3+deb13u3`	Fixed	[CVE-2026-40194]
Debiantrixie	php-phpseclib3	`3.0.43-2+deb13u2`	FixedDistribution-reported fixed boundary	[CVE-2026-40194]
Debiantrixie	php-phpseclib3	`3.0.43-2+deb13u3`	Fixed	[CVE-2026-40194]
Debiantrixie	phpseclib	`1.0.23-6+deb13u2`	FixedDistribution-reported fixed boundary	[CVE-2026-40194]
Debiantrixie	phpseclib	`1.0.23-6+deb13u3`	Fixed	[CVE-2026-40194]
Debiantrixie-security	php-phpseclib	`2.0.48-3+deb13u1`	Affected	[CVE-2026-40194]
Debiantrixie-security	php-phpseclib3	`3.0.43-2+deb13u1`	Affected	[CVE-2026-40194]
Debiantrixie-security	phpseclib	`1.0.23-6+deb13u1`	Affected	[CVE-2026-40194]
Ubuntunoble	php-phpseclib	`2.0.47-1ubuntu0.1~esm1`	UnknownSource applicability is not established	Provider not reported

Original provider fields

{
  "package_releases": [
    {
      "name": "phpseclib",
      "status": "fixed",
      "release": "sid",
      "version": "1.0.30-1"
    },
    {
      "name": "phpseclib",
      "status": "fixed",
      "release": "trixie",
      "version": "1.0.23-6+deb13u3"
    },
    {
      "name": "phpseclib",
      "status": "vulnerable",
      "release": "trixie-security",
      "version": "1.0.23-6+deb13u1"
    },
    {
      "name": "phpseclib",
      "status": "fixed",
      "release": "bookworm",
      "version": "1.0.20-1+deb12u5"
    },
    {
      "name": "phpseclib",
      "status": "vulnerable",
      "release": "bookworm-security",
      "version": "1.0.20-1+deb12u3"
    },
    {
      "name": "php-phpseclib",
      "status": "fixed",
      "release": "sid",
      "version": "2.0.55-1"
    },
    {
      "name": "php-phpseclib",
      "status": "fixed",
      "release": "forky",
      "version": "2.0.55-1"
    },
    {
      "name": "php-phpseclib",
      "status": "fixed",
      "release": "trixie",
      "version": "2.0.48-3+deb13u3"
    },
    {
      "name": "php-phpseclib",
      "status": "vulnerable",
      "release": "trixie-security",
      "version": "2.0.48-3+deb13u1"
    },
    {
      "name": "php-phpseclib",
      "status": "fixed",
      "release": "bookworm",
      "version": "2.0.42-1+deb12u5"
    },
    {
      "name": "php-phpseclib",
      "status": "vulnerable",
      "release": "bookworm-security",
      "version": "2.0.42-1+deb12u3"
    },
    {
      "name": "php-phpseclib3",
      "status": "fixed",
      "release": "sid",
      "version": "3.0.57-1"
    },
    {
      "name": "php-phpseclib3",
      "status": "fixed",
      "release": "forky",
      "version": "3.0.57-1"
    },
    {
      "name": "php-phpseclib3",
      "status": "fixed",
      "release": "trixie",
      "version": "3.0.43-2+deb13u3"
    },
    {
      "name": "php-phpseclib3",
      "status": "vulnerable",
      "release": "trixie-security",
      "version": "3.0.43-2+deb13u1"
    },
    {
      "name": "php-phpseclib3",
      "status": "fixed",
      "release": "bookworm",
      "version": "3.0.19-1+deb12u6"
    },
    {
      "name": "php-phpseclib3",
      "status": "vulnerable",
      "release": "bookworm-security",
      "version": "3.0.19-1+deb12u4"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "phpseclib",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "1.0.28-1"
    },
    {
      "bug": null,
      "name": "phpseclib",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "1.0.23-6+deb13u2"
    },
    {
      "bug": null,
      "name": "phpseclib",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "1.0.20-1+deb12u4"
    },
    {
      "bug": null,
      "name": "php-phpseclib",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "2.0.53-1"
    },
    {
      "bug": null,
      "name": "php-phpseclib",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "2.0.53-1"
    },
    {
      "bug": null,
      "name": "php-phpseclib",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "2.0.48-3+deb13u2"
    },
    {
      "bug": null,
      "name": "php-phpseclib",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "2.0.42-1+deb12u4"
    },
    {
      "bug": null,
      "name": "php-phpseclib3",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "3.0.51-1"
    },
    {
      "bug": null,
      "name": "php-phpseclib3",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "3.0.51-1"
    },
    {
      "bug": null,
      "name": "php-phpseclib3",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "3.0.43-2+deb13u2"
    },
    {
      "bug": null,
      "name": "php-phpseclib3",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "3.0.19-1+deb12u5"
    }
  ],
  "distribution_packages": [
    {
      "name": "phpseclib",
      "fixed_version": "",
      "applicability_unknown": true
    },
    {
      "name": "phpseclib",
      "fixed_version": "2.0.53",
      "applicability_unknown": true
    },
    {
      "name": "phpseclib",
      "fixed_version": "3.0.51",
      "applicability_unknown": true
    },
    {
      "name": "php-phpseclib",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "2.0.47-1ubuntu0.1~esm1",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "2.0.47-1ubuntu0.1~esm1",
      "applicability_unknown": true
    }
  ]
}

OpenFactory catalog packages

A associação de pacotes está em andamento.

[Debian 12 (Bookworm)]

[php-phpseclib]Desconhecido
Detalhes (4)
- 2.0.42-1+deb12u5 · all · bookworm
  Corrigida · Corrigida: 2.0.42-1+deb12u4
  nvd · php-phpseclib · debian · bookworm; nvd · php-phpseclib · debian · 12
- 2.0.42-1+deb12u5 · all · bookworm
  Corrigida · Corrigida: 2.0.42-1+deb12u4
  nvd · php-phpseclib · debian · bookworm; nvd · php-phpseclib · debian · 12
- 2.0.42-1+deb12u3 · all · bookworm-security
  Afetada · Corrigida: 2.0.42-1+deb12u4
  nvd · php-phpseclib · debian · bookworm; nvd · php-phpseclib · debian · 12
- 2.0.42-1+deb12u3 · all · bookworm-security
  Afetada · Corrigida: 2.0.42-1+deb12u4
  nvd · php-phpseclib · debian · bookworm; nvd · php-phpseclib · debian · 12
[php-phpseclib3]Desconhecido
Detalhes (4)
- 3.0.19-1+deb12u6 · all · bookworm
  Corrigida · Corrigida: 3.0.19-1+deb12u5
  nvd · php-phpseclib3 · debian · bookworm; nvd · php-phpseclib3 · debian · 12
- 3.0.19-1+deb12u6 · all · bookworm
  Corrigida · Corrigida: 3.0.19-1+deb12u5
  nvd · php-phpseclib3 · debian · bookworm; nvd · php-phpseclib3 · debian · 12
- 3.0.19-1+deb12u4 · all · bookworm-security
  Afetada · Corrigida: 3.0.19-1+deb12u5
  nvd · php-phpseclib3 · debian · bookworm; nvd · php-phpseclib3 · debian · 12
- 3.0.19-1+deb12u4 · all · bookworm-security
  Afetada · Corrigida: 3.0.19-1+deb12u5
  nvd · php-phpseclib3 · debian · bookworm; nvd · php-phpseclib3 · debian · 12
[php-seclib]Desconhecido
Pacote fonte: [phpseclib]
Detalhes (4)
- 1.0.20-1+deb12u5 · all · bookworm
  Corrigida · Corrigida: 1.0.20-1+deb12u4
  nvd · phpseclib · debian · bookworm; nvd · phpseclib · debian · 12
- 1.0.20-1+deb12u5 · all · bookworm
  Corrigida · Corrigida: 1.0.20-1+deb12u4
  nvd · phpseclib · debian · bookworm; nvd · phpseclib · debian · 12
- 1.0.20-1+deb12u3 · all · bookworm-security
  Afetada · Corrigida: 1.0.20-1+deb12u4
  nvd · phpseclib · debian · bookworm; nvd · phpseclib · debian · 12
- 1.0.20-1+deb12u3 · all · bookworm-security
  Afetada · Corrigida: 1.0.20-1+deb12u4
  nvd · phpseclib · debian · bookworm; nvd · phpseclib · debian · 12

[Debian 13 (Trixie)]

[php-phpseclib]Desconhecido
Detalhes (4)
- 2.0.48-3+deb13u3 · all · trixie
  Corrigida · Corrigida: 2.0.48-3+deb13u2
  nvd · php-phpseclib · debian · 13
- 2.0.48-3+deb13u3 · all · trixie
  Corrigida · Corrigida: 2.0.48-3+deb13u2
  nvd · php-phpseclib · debian · 13
- 2.0.48-3+deb13u1 · all · trixie-security
  Afetada · Corrigida: 2.0.48-3+deb13u2
  nvd · php-phpseclib · debian · 13
- 2.0.48-3+deb13u1 · all · trixie-security
  Afetada · Corrigida: 2.0.48-3+deb13u2
  nvd · php-phpseclib · debian · 13
[php-phpseclib3]Desconhecido
Detalhes (4)
- 3.0.43-2+deb13u3 · all · trixie
  Corrigida · Corrigida: 3.0.43-2+deb13u2
  nvd · php-phpseclib3 · debian · 13
- 3.0.43-2+deb13u3 · all · trixie
  Corrigida · Corrigida: 3.0.43-2+deb13u2
  nvd · php-phpseclib3 · debian · 13
- 3.0.43-2+deb13u1 · all · trixie-security
  Afetada · Corrigida: 3.0.43-2+deb13u2
  nvd · php-phpseclib3 · debian · 13
- 3.0.43-2+deb13u1 · all · trixie-security
  Afetada · Corrigida: 3.0.43-2+deb13u2
  nvd · php-phpseclib3 · debian · 13
[php-seclib]Desconhecido
Pacote fonte: [phpseclib]
Detalhes (4)
- 1.0.23-6+deb13u3 · all · trixie
  Corrigida · Corrigida: 1.0.23-6+deb13u2
  nvd · phpseclib · debian · 13
- 1.0.23-6+deb13u3 · all · trixie
  Corrigida · Corrigida: 1.0.23-6+deb13u2
  nvd · phpseclib · debian · 13
- 1.0.23-6+deb13u1 · all · trixie-security
  Afetada · Corrigida: 1.0.23-6+deb13u2
  nvd · phpseclib · debian · 13
- 1.0.23-6+deb13u1 · all · trixie-security
  Afetada · Corrigida: 1.0.23-6+deb13u2
  nvd · phpseclib · debian · 13

Observado: Oct 28, 2026, 5:42:03 PM 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] · [Ubuntu Security Notices (USN)]