CVE catalog

CVE-2026-2967

Severity: Medium · CVSS 6.3
Published: Feb 23, 2026, 2:32:07 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.57% · Oct 25, 2026

A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This affects the function getpeer of the file /src/net_builtin.c of the component TCP Sequence Number Handler. The manipulation leads to improper verification of source of a communication channel. The attack may be initiated remotely. The attack's complexity is rated as high. The exploitability is reported as difficult. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	swupdate	sid	`2026.05.1+git20261001+dfsg-2`	fixed
Debian	swupdate	forky	`2026.05.1+git20261001+dfsg-2`	fixed
Debian	swupdate	trixie	`2024.12.1+dfsg-3+deb13u2`	vulnerable
Debian	swupdate	bookworm	`2022.12+dfsg-4+deb12u2`	vulnerable
Debian	swupdate	bookworm-security	`2022.12+dfsg-4+deb12u3`	vulnerable
Cpe	swupdate	Not reported	Not reported	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	swupdate	source	sid	`2025.12+dfsg-10`	not yet assigned	Not reported	Not reported
Debian	swupdate	source	forky	`2025.12+dfsg-10`	not yet assigned	Not reported	Not reported
Debian	swupdate	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	swupdate	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported

Notes

[trixie] swupdate: Minor issue [bookworm] swupdate: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libswupdate0.1]Affected
Source package: [swupdate]
Details (4)
- 2022.12+dfsg-4+deb12u2 · amd64 · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2022.12+dfsg-4+deb12u2 · arm64 · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
[libswupdate-dev]Affected
Source package: [swupdate]
Details (4)
- 2022.12+dfsg-4+deb12u2 · amd64 · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2022.12+dfsg-4+deb12u2 · arm64 · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
[lua-swupdate]Affected
Source package: [swupdate]
Details (4)
- 2022.12+dfsg-4+deb12u2 · amd64 · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2022.12+dfsg-4+deb12u2 · arm64 · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
[swupdate]Affected
Details (4)
- 2022.12+dfsg-4+deb12u2 · amd64 · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2022.12+dfsg-4+deb12u2 · arm64 · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
[swupdate-doc]Affected
Source package: [swupdate]
Details (4)
- 2022.12+dfsg-4+deb12u2 · all · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2022.12+dfsg-4+deb12u2 · all · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · all · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · all · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
[swupdate-www]Affected
Source package: [swupdate]
Details (4)
- 2022.12+dfsg-4+deb12u2 · all · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2022.12+dfsg-4+deb12u2 · all · bookworm
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · all · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12
- 2024.12.1+dfsg-3~bpo12+1 · all · bookworm-backports
  Affected
  nvd · swupdate · debian · bookworm; nvd · swupdate · debian · 12

[Debian 13 (Trixie)]

[libswupdate0.1]Affected
Source package: [swupdate]
Details (4)
- 2024.12.1+dfsg-3+deb13u2 · amd64 · trixie
  Affected
  nvd · swupdate · debian · 13
- 2024.12.1+dfsg-3+deb13u2 · arm64 · trixie
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · amd64 · trixie-backports
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · arm64 · trixie-backports
  Affected
  nvd · swupdate · debian · 13
[libswupdate-dev]Affected
Source package: [swupdate]
Details (4)
- 2024.12.1+dfsg-3+deb13u2 · amd64 · trixie
  Affected
  nvd · swupdate · debian · 13
- 2024.12.1+dfsg-3+deb13u2 · arm64 · trixie
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · amd64 · trixie-backports
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · arm64 · trixie-backports
  Affected
  nvd · swupdate · debian · 13
[lua-swupdate]Affected
Source package: [swupdate]
Details (4)
- 2024.12.1+dfsg-3+deb13u2 · amd64 · trixie
  Affected
  nvd · swupdate · debian · 13
- 2024.12.1+dfsg-3+deb13u2 · arm64 · trixie
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · amd64 · trixie-backports
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · arm64 · trixie-backports
  Affected
  nvd · swupdate · debian · 13
[swupdate]Affected
Details (4)
- 2024.12.1+dfsg-3+deb13u2 · amd64 · trixie
  Affected
  nvd · swupdate · debian · 13
- 2024.12.1+dfsg-3+deb13u2 · arm64 · trixie
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · amd64 · trixie-backports
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · arm64 · trixie-backports
  Affected
  nvd · swupdate · debian · 13
[swupdate-doc]Affected
Source package: [swupdate]
Details (4)
- 2024.12.1+dfsg-3+deb13u2 · all · trixie
  Affected
  nvd · swupdate · debian · 13
- 2024.12.1+dfsg-3+deb13u2 · all · trixie
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · all · trixie-backports
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · all · trixie-backports
  Affected
  nvd · swupdate · debian · 13
[swupdate-www]Affected
Source package: [swupdate]
Details (4)
- 2024.12.1+dfsg-3+deb13u2 · all · trixie
  Affected
  nvd · swupdate · debian · 13
- 2024.12.1+dfsg-3+deb13u2 · all · trixie
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · all · trixie-backports
  Affected
  nvd · swupdate · debian · 13
- 2026.05.1+dfsg-1~bpo13+1 · all · trixie-backports
  Affected
  nvd · swupdate · debian · 13

Observed: Oct 24, 2026, 12:39:13 AM UTC

References

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