CVE-2026-101014
A vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2.
Does this matter?
Lower severity and a low EPSS score (0.31%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 4.0
- 5.5 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.31% probability · 24th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-189, CWE-193
- Source
- cna@vuldb.com
EPSS moved from 0.3% on 28 September 2026 to 0.3% on 26 October 2026.
References
- https://github.com/trusteddomainproject/OpenDMARC/commit/b3b1da9264bc80324094a27c71e7369bdedc62ae
- https://github.com/trusteddomainproject/OpenDMARC/pull/188
- https://github.com/trusteddomainproject/OpenDMARC/pull/344
- https://vuldb.com/cve/CVE-2026-101014
- https://vuldb.com/submit/917100
- https://vuldb.com/vuln/410884
- https://vuldb.com/vuln/410884/cti
- https://weitongli.com/share/opendmarc-cleanup-off-by-one.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.