CVE-2026-101280
HighCVSS 7.3Exploitation Probability (EPSS)
Low risk32th percentile - higher than 32% of all known CVEs
Summary
A vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2. Affected is the function opendmarc_policy_query_dmarc of the component Multi-Record Set Handler. The manipulation results in authentication bypass by spoofing. The attack can be executed remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Risk Assessment
A remote attacker can bypass DMARC authentication through spoofing, enabling the sending of forged emails and conducting phishing attacks.
Recommendation
Consider applying fixes or mitigations for OpenDMARC, as the vendor has not released an official solution, and monitor email traffic for spoofing attempts.
Other vulnerabilities in OpenDMARC
See all- CVE-2026-101017Medium
A vulnerability in OpenDMARC up to 1.4.2 affects the strcasecmp function in libopendmarc/opendmarc_policy.c, leading to improper handling of exceptional conditions. The attack can be executed remotely, and the exploit has been made public.
- CVE-2026-101016Medium
A vulnerability in OpenDMARC up to 1.4.2 affects the opendmarc_policy_parse_dmarc function in libopendmarc/opendmarc_policy.c. Manipulation of arguments like fo/rf/ri/pct/sp/adkim/aspf/rua/ruf leads to improper handling of exceptional conditions. Remote exploitation is possible, and the exploit has been disclosed.
- CVE-2026-101014High
A vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2 in the function opendmarc_util_cleanup in libopendmarc/opendmarc_util.c of the DMARC Record Parser component. Manipulation results in an off-by-one, and the attack may be initiated remotely. The exploit is public and the patch is named b3b1da9264bc80324094a27c71e7369bdedc62ae.
- CVE-2026-100890Medium
A null pointer dereference vulnerability was found in OpenDMARC up to 1.4.2 in the opendmarc_spf_ipv6_explode function. Manipulating the cp argument causes the issue. The attack can be initiated remotely and the exploit is published.
- CVE-2026-101281High
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.
- CVE-2026-101279Medium
A security vulnerability has been detected in Trusted Domain Project OpenDMARC up to 1.4.2 in an unknown function of the file libopendmarc/opendmarc_policy.c of the DMARC Parser component. Manipulation of the pct argument leads to integer overflow. Remote exploitation is possible, and the exploit is public.
- CVE-2026-101278Medium
A weakness has been identified in Trusted Domain Project OpenDMARC up to 1.4.2 in the opendmarc_get_tld function of the file libopendmarc/opendmarc_tld.c of the PSL Wildcard Handler component. Executing a manipulation leads to origin validation error. The attack may be launched remotely, and the exploit is public.
- CVE-2026-101015High
A flaw was found in Trusted Domain Project OpenDMARC up to 1.4.2 in unknown functionality of policy.c in the Domain Handler component. Manipulation leads to improper validation of unsafe equivalence, and the attack can be launched remotely. The exploit has been published and may be used.
- CVE-2026-100891High
Vulnerability in Trusted Domain Project OpenDMARC up to version 1.4.2 in the opendmarc_policy_query_dmarc function in libopendmarc/opendmarc_policy.c of the Internationalized Domain Name Handler component. Manipulation leads to encoding error. Remote attack possible, exploit publicly disclosed.
Original NVD description (English source)
A vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2. Affected is the function opendmarc_policy_query_dmarc of the component Multi-Record Set Handler. The manipulation results in authentication bypass by spoofing. The attack can be executed remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS