CVE-2026-101281 Details
Description
A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_sp2_find_mailfrom_domain of the file libopendmarc/opendmarc_spf.c of the component SPF Macro Handler. This manipulation causes improper authentication. The attack is possible to be carried out remotely. The exploit has been published and may be used. Patch name: c48a74c758677fc5272a73eff15ffdbf8afda1a6. Applying a patch is the recommended action to fix this issue.
An authentication bypass vulnerability has been identified in Trusted Domain Project OpenDMARC versions through 1.4.2. The issue arises in the SPF Macro Handler component, specifically within the 'opendmarc_sp2_find_mailfrom_domain' function of 'libopendmarc/opendmarc_spf.c'. This vulnerability allows improper authentication to be executed remotely. The flaw has been exploited and the patch is available.
Users are advised to update to the latest version of OpenDMARC, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 29, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/trusteddomainproject/OpenDMARC/commit/c48a74c758677fc5272a73eff15ffdbf8afda1a6 | [email protected] | Source CodeVendor |
| https://github.com/trusteddomainproject/OpenDMARC/issues/262 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
| https://github.com/trusteddomainproject/OpenDMARC/pull/328 | [email protected] | Issue TrackingVendor |
| https://vuldb.com/cve/CVE-2026-101281 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/918284 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/411038 | [email protected] | BundlePermission Required |
| https://vuldb.com/vuln/411038/cti | [email protected] | Content Wall |
| https://xuyongzhe-vt.github.io/share/opendmarc-spf-postmaster-macro.html | [email protected] | ExploitRemedyTechnical Analysis |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-287 | Improper Authentication | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Trusted Domain Project OpenDMARC | <= 1.4.2 (semver) |
CPE
Remediation
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Change History
1 change record found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 29, 2026 | New CVE Received | [email protected] |
Volerion