A vulnerability was found in Trusted Domain Project OpenDMARC up to 1.4.2. (CVE-2026-101017)
Description
A medium severity vulnerability (CVE-2026-101017) exists in Trusted Domain Project OpenDMARC up to version 1.4.2. The flaw is in the strcasecmp function within libopendmarc/opendmarc_policy.c and can be exploited remotely to cause improper handling of exceptional conditions. Exploit code has been publicly disclosed, but no vendor response or patch is currently available.
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
CVE-2026-101017 is a vulnerability in the Trusted Domain Project OpenDMARC software affecting versions up to 1.4.2. It involves the strcasecmp function in the libopendmarc/opendmarc_policy.c source file, where manipulation leads to incorrect handling of exceptional conditions. The vulnerability is remotely exploitable and has a CVSS v3.1 base score of 6.5, indicating medium severity. Public exploit code exists, but the vendor has not responded or provided a fix as of the publication date.
Potential Impact
The vulnerability allows remote attackers to manipulate the strcasecmp function leading to improper handling of exceptional conditions. This can result in integrity and availability impacts, as indicated by the CVSS vector (no confidentiality impact, but integrity and availability impacts are present). No confirmed active exploitation in the wild is reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vendor has not responded and no official fix is available, users should monitor for updates from the vendor or community. Until a patch is released, consider applying workarounds if available or limiting exposure of the vulnerable service to untrusted networks.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-101017
- 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: 6ad3f5022cdf04f656657bda
Added to database: 10/17/2026, 22:21:54 UTC
Last enriched: 10/17/2026, 22:50:10 UTC
Last updated: 10/17/2026, 22:50:10 UTC
Views: 3
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.