---
title: "CVE-2026-101277\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2026-101277?format=md
keywords: index, follow
---

# CVE-2026-101277

Publication date 29 September 2026

Last updated 29 September 2026

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**6.5 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2026-101277?format=md#impact-score)

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## 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.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| opendkim | 26.04 LTS resolute | Needs evaluation |
| 24.04 LTS noble | Needs evaluation |
| 22.04 LTS jammy | Needs evaluation |
| 20.04 LTS focal | Needs evaluation |
| 18.04 LTS bionic | Needs evaluation |
| 16.04 LTS xenial | Needs evaluation |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:

CVSS v4.0

[CVSS v4.0](https://ubuntu.com/security/CVE-2026-101277?format=md)
[CVSS v3.0](https://ubuntu.com/security/CVE-2026-101277?format=md)

**Base score**

5.5 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Attack requirements | None |
  | Privileges required | None |
  | User interaction | None |
  | Vulnerable system - Confidentiality impact | None |
  | Vulnerable system - Integrity impact | Low |
  | Vulnerable system - Availability impact | Low |
  | Subsequent system - Confidentiality impact | None |
  | Subsequent system - Integrity impact | None |
  | Subsequent system - Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.5 · Medium |
  | Base + Threat score | - |
  | Base + Environmental score | - |
  | Base + Threat + Environmental score | - |

**Vector:** CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-101277)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-101277)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2026-101277)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2026-101277)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2026-101277>
* <https://vuldb.com/cve/CVE-2026-101277>
* <https://vuldb.com/submit/918270>
* <https://vuldb.com/vuln/411034>
* <https://vuldb.com/vuln/411034/cti>
* <https://xuyongzhe-vt.github.io/share/opendkim-tag-parser-desync.html>