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CVE-2026-101277— Trusted Domain Project OpenDKIM Tag Tokenizer dkim.c dkim_process_set less trusted source

Quick assessment

Affected
Trusted Domain Project OpenDKIM
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Trusted Domain Project OpenDKIM 版本 2.11.0 及以下版本中发现了一个安全漏洞。受影响的组件是“标签标记解析器”（Tag Tokenizer）中位于 文件里的 函数。利用此漏洞可导致系统使用可信度较低的来源。该漏洞可从远程发起攻击。目前该漏洞的利用代码已在公开渠道发布，可能被攻击者用于实施恶意攻击。供应商在披露前已被联系，但对此未作任何回应。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-101277

Vulnerability Information
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Vulnerability Title
Trusted Domain Project OpenDKIM Tag Tokenizer dkim.c dkim_process_set less trusted source
Source: CVE Program / CVE List V5
Vulnerability Description
A security flaw has been discovered in Trusted Domain Project OpenDKIM up to 2.11.0. The impacted element is the function dkim_process_set of the file dkim.c of the component Tag Tokenizer. Performing a manipulation results in use of less trusted source. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
使用不可信的源
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Trusted Domain Project OpenDKIM 2.0 cpe:2.3:a:trusted_domain_project:opendkim:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-101277

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III. Intelligence Information for CVE-2026-101277

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Vendor Advisories for CVE-2026-101277 (1)

Other References for CVE-2026-101277 (4)

Same Patch Batch · Trusted Domain Project · 2026-09-28 · 8 CVEs total

CVE-2026-101014 7.3 HIGH Trusted Domain Project OpenDMARC DMARC Record opendmarc_util.c opendmarc_util_cleanup off-
CVE-2026-101015 7.3 HIGH Trusted Domain Project OpenDMARC policy.c improper validation of unsafe equivalence in inp
CVE-2026-100891 7.3 HIGH Trusted Domain Project OpenDMARC Internationalized Domain Name opendmarc_policy.c opendmar
CVE-2026-101016 6.5 MEDIUM Trusted Domain Project OpenDMARC opendmarc_policy.c opendmarc_policy_parse_dmarc exception
CVE-2026-101017 6.5 MEDIUM Trusted Domain Project OpenDMARC opendmarc_policy.c strcasecmp exceptional condition
CVE-2026-100895 5.3 MEDIUM Trusted Domain Project OpenARC libopenarc arc-canon.c arc_parse_canon_t null pointer deref
CVE-2026-100890 5.3 MEDIUM Trusted Domain Project OpenDMARC SPF Parser opendmarc_spf.c opendmarc_spf_ipv6_explode nul

IV. Related Vulnerabilities

Same product: OpenDKIM
Same vendor: Trusted Domain Project
Same weakness: CWE-348

V. Comments for CVE-2026-101277

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