Threat database

CVE-2026-101278 is a medium severity vulnerability in Trusted Domain Project OpenDMARC versions 1.4.0, 1.4.1, and 1.4.2. It involves an origin validation error caused by manipulation of the PSL Wildcard Handler in the opendmarc_get_tld function. No patch or fix is currently available, and the vendor has not responded to the disclosure. Public exploit code exists, but no exploitation in the wild has been reported.

A vulnerability in Trusted Domain Project OpenDMARC up to version 1.4.2 allows remote attackers to cause improper authentication via the opendmarc_sp2_find_mailfrom_domain function in the SPF Macro Handler component. This flaw has a CVSS 4.0 base score of 6.9 (medium severity). An exploit has been published, and a patch is available to remediate the issue.

CVE-2026-101277 is a medium severity vulnerability in Trusted Domain Project OpenDKIM up to version 2.11.0. It involves the dkim_process_set function in the dkim.c file of the Tag Tokenizer component, where manipulation can cause the use of a less trusted source. The vulnerability can be exploited remotely without authentication, and public exploit code is available. The vendor has not responded to the disclosure, and no official patch information is provided.

A vulnerability was found in Trusted Domain Project OpenDMARC up to 1.4.2. This vulnerability affects the function strcasecmp in the library libopendmarc/opendmarc_policy.c. The manipulation results in handling of exceptional conditions. The attack can be executed remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

A vulnerability has been found in Trusted Domain Project OpenDMARC up to 1.4.2. This affects the function opendmarc_policy_parse_dmarc in the library libopendmarc/opendmarc_policy.c. The manipulation of the argument fo/rf/ri/pct/sp/adkim/aspf/rua/ruf leads to handling of exceptional conditions. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVE-2026-101015 is a medium severity vulnerability in Trusted Domain Project OpenDMARC up to version 1.4.2. It involves improper validation of unsafe equivalence in input within the Domain Handler component (policy.c). The flaw can be exploited remotely without authentication and has publicly available exploit code. The vendor has not responded to the disclosure, and no official patch or fix has been confirmed.

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.

A security flaw has been discovered in Trusted Domain Project OpenARC up to 1.0.0.Beta1. Impacted is the function arc_parse_canon_t in the library libopenarc/arc-canon.c of the component libopenarc. The manipulation results in null pointer dereference. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 1.0.0.Beta0 is recommended to address this issue. Upgrading the affected component is advised.

CVE-2026-100888 is an out-of-bounds write vulnerability in the Trusted Domain Project OpenDKIM software, specifically in the dkim_canon_selecthdrs function of the DKIM Signature Header Selection component. This flaw affects OpenDKIM versions 2.0 through 2.11.0. The vulnerability can be exploited remotely without authentication by manipulating a function argument, potentially leading to memory corruption. Public exploit code is available, but no vendor response or patch has been provided as of the publication date.

CVE-2026-100891 is a medium severity vulnerability in Trusted Domain Project OpenDMARC up to version 1.4.2. It involves an encoding error in the Internationalized Domain Name Handler component, specifically in the opendmarc_policy_query_dmarc function. This flaw can be exploited remotely without authentication. The vulnerability has been publicly disclosed, but no vendor response or patch is currently available.

A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_spf_ipv6_explode in the library libopendmarc/opendmarc_spf.c of the component SPF Parser. This manipulation of the argument cp causes null pointer dereference. It is possible to initiate the attack remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

A vulnerability was detected in Trusted Domain Project OpenDKIM up to 2.11.0. Affected is the function dkim_qp_decode of the file util.c of the component Decoder. The manipulation results in off-by-one. The attack may be performed from remote. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.