A vulnerability has been found in Trusted Domain Project OpenDMARC up to 1.4.2. (CVE-2026-101016)
Description
A vulnerability exists in Trusted Domain Project OpenDMARC up to version 1.4.2 affecting the function opendmarc_policy_parse_dmarc. The issue involves manipulation of certain arguments leading to improper handling of exceptional conditions. Remote exploitation is possible, and the vulnerability has been publicly disclosed. The vendor has not responded to the disclosure. The CVSS score is 6.5, indicating a medium severity level.
CVSS v3.1
Score 6.5medium
Affected software
pkg:deb/ubuntu/opendmarc?arch=source&distro=esm-apps/xenialpkg:deb/ubuntu/opendmarc?arch=source&distro=bionicpkg:deb/ubuntu/opendmarc?arch=source&distro=focalpkg:deb/ubuntu/opendmarc?arch=source&distro=jammypkg:deb/ubuntu/opendmarc?arch=source&distro=noblepkg:deb/ubuntu/opendmarc?arch=source&distro=stonkingpkg:deb/ubuntu/opendmarc?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in OpenDMARC up to version 1.4.2 affects the opendmarc_policy_parse_dmarc function in libopendmarc/opendmarc_policy.c. It arises from manipulation of the arguments fo, rf, ri, pct, sp, adkim, aspf, rua, and ruf, which causes the software to improperly handle exceptional conditions. This flaw allows remote attackers to exploit the vulnerability. The issue has been publicly disclosed, but no vendor response or patch information is available.
Potential Impact
The vulnerability allows remote attackers to exploit the affected function, potentially causing denial of service or other availability impacts. There is no indication of confidentiality loss, but integrity impact is possible. The CVSS vector indicates no privileges required, no user interaction, and network attack vector, making it remotely exploitable.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vendor has not responded and no patch links are provided, monitor official channels for updates and consider applying any future patches promptly.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-101016
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:Pro:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad3f5022cdf04f656657bdb
Added to database: 10/17/2026, 22:21:54 UTC
Last enriched: 10/17/2026, 22:50:15 UTC
Last updated: 10/17/2026, 22:50:15 UTC
Views: 3
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