Trusted Domain Project OpenDMARC opendmarc_policy.c integer overflow (CVE-2026-101279) | HOL Guard CVE

Medium · CVSS 6.9CVE-2026-101279

Trusted Domain Project OpenDMARC opendmarc_policy.c integer overflow

Answer in brief

CVE-2026-101279 records a Medium severity (CVSS 6.9) vulnerability in Trusted Domain Project OpenDMARC opendmarc_policy.c integer overflow. The current sources do not mark it as known exploited. The current feed maps Trusted Domain Project/OpenDMARC (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 29, 2026Updated Sep 29, 2026Source checked Sep 29, 2026First seen by HOL Sep 29, 2026Material review Sep 29, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.9
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Trusted Domain Project/OpenDMARC (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Trusted Domain Project/OpenDMARCgeneric	1.4.0 \|\| 1.4.1 \|\| 1.4.2	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Trusted Domain Project/OpenDMARC.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 29, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 29, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 29, 2026

Sources and claim methodology

Upstream source description

A security vulnerability has been detected in Trusted Domain Project OpenDMARC up to 1.4.2. This impacts an unknown function of the file libopendmarc/opendmarc_policy.c of the component DMARC Parser. The manipulation of the argument pct leads to integer overflow. Remote exploitation of the attack is possible. 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.

Quoted source text, attributed separately from HOL analysis.