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Vulnerabilities

Vulnerability · CVE-2026-118179

Clicking a news: or snews: link that referenced a message-ID made Thunderbird connect, without asking, to the host and port given in the link, even if it was not a configured news

Published Oct 27, 2026 · catalog updated Oct 28, 2026 · Mozilla Thunderbird

Last checked Nov 8, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-118179. EPSS is 0.38%. Act only if a listed version of Mozilla Thunderbird is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.38%
Remediation
Advisory link
Affected products
Debian:12 thunderbird · Debian:13 thunderbird · Debian:14 thunderbird · vendor Mozilla Thunderbird

Clicking a news: or snews: link that referenced a message-ID made Thunderbird connect, without asking, to the host and port given in the link, even if it was not a configured news server. Line breaks in the message-ID were sent to the server unmodified, so a crafted link could send arbitrary commands to services reachable from the user's network. In addition, snews: links to such servers connected without TLS. This vulnerability was fixed in Thunderbird 159 and Thunderbird 153.6.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:12 thunderbird1:102.11.0-1, 1:102.12.0-1, 1:102.12.0-1~deb10u1
  • Debian:13 thunderbird1:128.13.0esr-1, 1:128.14.0esr-1, 1:128.14.0esr-1~deb11u1
  • Debian:14 thunderbird1:128.13.0esr-1, 1:128.14.0esr-1, 1:128.14.0esr-1~deb11u1
  • vendor Mozilla Thunderbirdversion unspecified

How to fix CVE-2026-118179

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-118179. EPSS is 0.38%. Act only if a listed version of Mozilla Thunderbird is installed.

Which versions are affected?

Compare what you have installed with 1:102.11.0-1, 1:102.12.0-1, 1:102.12.0-1~deb10u1, 1:128.13.0esr-1, 1:128.14.0esr-1, 1:128.14.0esr-1~deb11u1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.38%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 27, 2026 · Mozilla Security Advisories

    Detected

    CVE-2026-118179 is listed by Security Vulnerabilities fixed in Thunderbird 153.6 — Mozilla.

  2. Oct 28, 2026 · Trivy Vulnerability DB

    Updated

    Clicking a news: or snews: link that referenced a message-ID made Thunderbird connect, without asking, to the host and port given in the link, even if it was not a configured news server. Line breaks in the message-ID were sent to the server unmodified, so a crafted link could send arbitrary commands to services reachable from the user's network. In addition, snews: links to such servers connected

Sources

  • CVE.orgVulnerability recordCVE-2026-118179

    Clicking a news: or snews: link that referenced a message-ID made Thunderbird connect, without asking, to the host and port given in the link, even if it was not a configured news server. Line breaks in the message-ID were sent to the server unmodified, so a crafted link could se

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-118179

    30-day exploitation probability 0.38%

    first.org
  • Mozilla Security AdvisoriesVendor advisoryCVE-2026-118179

    Security Vulnerabilities fixed in Thunderbird 153.6 — Mozilla

    mozilla.org
  • Trivy Vulnerability DBPackage advisoryDEBIAN-CVE-2026-118179

    Clicking a news: or snews: link that referenced a message-ID made Thunderbird connect, without asking, to the host and port given in the link, even if it was not a configured news server. Line breaks in the message-ID were sent to the server unmodified, so a crafted link could se

    osv.dev

References

Freshness

Last verified in this catalog Nov 8, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 8, 2026
  • Mozilla Security AdvisoriesNov 4, 2026
  • CVE.orgOct 28, 2026
  • Trivy Vulnerability DBOct 28, 2026