CVE catalog

CVE-2026-101014

A vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_util_cleanup in the library libopendmarc/opendmarc_util.c of the

[CVE catalog]

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Sep 28, 2026, 8:15:13 AM UTC
Updated: Sep 28, 2026, 9:17:03 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.31% · Oct 25, 2026

A vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_util_cleanup in the library libopendmarc/opendmarc_util.c of the component DMARC Record Parser. Performing a manipulation results in off-by-one. The attack may be initiated remotely. The exploit is now public and may be used. The patch is named b3b1da9264bc80324094a27c71e7369bdedc62ae. To fix this issue, it is recommended to deploy a patch.

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	opendmarc	sid	`1.4.2-5.1`	vulnerable
Debian	opendmarc	forky	`1.4.2-5.1`	vulnerable
Debian	opendmarc	trixie	`1.4.2-5`	vulnerable
Debian	opendmarc	bookworm	`1.4.2-2`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	opendmarc	source	sid	`(unfixed)`	not yet assigned	Not reported	[1149876]
Debian	opendmarc	source	forky	`(unfixed)`	not yet assigned	Not reported	[1149876]
Debian	opendmarc	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1149876]
Debian	opendmarc	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1149876]

[Debian bug #1149876]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libopendmarc2]Affected
Source package: [opendmarc]
Details (2)
- 1.4.2-2+b1 · amd64 · bookworm
  Affected
  nvd · opendmarc · debian · bookworm; nvd · opendmarc · debian · 12
- 1.4.2-2+b1 · arm64 · bookworm
  Affected
  nvd · opendmarc · debian · bookworm; nvd · opendmarc · debian · 12
[libopendmarc-dev]Affected
Source package: [opendmarc]
Details (2)
- 1.4.2-2+b1 · amd64 · bookworm
  Affected
  nvd · opendmarc · debian · bookworm; nvd · opendmarc · debian · 12
- 1.4.2-2+b1 · arm64 · bookworm
  Affected
  nvd · opendmarc · debian · bookworm; nvd · opendmarc · debian · 12
[opendmarc]Affected
Source package: [opendmarc]
Details (2)
- 1.4.2-2+b1 · amd64 · bookworm
  Affected
  nvd · opendmarc · debian · bookworm; nvd · opendmarc · debian · 12
- 1.4.2-2+b1 · arm64 · bookworm
  Affected
  nvd · opendmarc · debian · bookworm; nvd · opendmarc · debian · 12

[Debian 13 (Trixie)]

[libopendmarc2t64]Affected
Source package: [opendmarc]
Details (2)
- 1.4.2-5 · amd64 · trixie
  Affected
  nvd · opendmarc · debian · 13
- 1.4.2-5 · arm64 · trixie
  Affected
  nvd · opendmarc · debian · 13
[libopendmarc-dev]Affected
Source package: [opendmarc]
Details (2)
- 1.4.2-5 · amd64 · trixie
  Affected
  nvd · opendmarc · debian · 13
- 1.4.2-5 · arm64 · trixie
  Affected
  nvd · opendmarc · debian · 13
[opendmarc]Affected
Details (2)
- 1.4.2-5 · amd64 · trixie
  Affected
  nvd · opendmarc · debian · 13
- 1.4.2-5 · arm64 · trixie
  Affected
  nvd · opendmarc · debian · 13

Observed: Oct 23, 2026, 7:48:10 PM UTC

References

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