VulnerabilityPublished 27 Oct 2026

CVE-2026-118180: thunderbird · When Logging

Affects thunderbirdSource GCVE Database

Authoritative record:CVE-2026-118180· High

Not known to be exploited : upgrade to 159 or 153.6 soon.

Data as of 27 Oct 2026, 22:13 UTC

Severity

High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Patch: Available – fixed in 159, 153.6

Exploitation evidence

Disclosed: evidence found.
CVE published 27 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-x88m-7whj-m9mh

What to do

Upgrade the Ubuntu ubuntu/thunderbird package to 159 or 153.6.

Affected software

Product	Affected	Fixed in
Ubuntuubuntu/thunderbird`pkg:deb/ubuntu/thunderbird`Other threats	Affected <153.6 <159	Fixed in 153.6 159

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

This vulnerability has been fixed in Thunderbird versions 159 and 153.6. Users should upgrade to these versions or later to mitigate the risk. No additional action is required if the software is updated.

Description

Thunderbird versions prior to 159 and 153.6 had a vulnerability where the homeserver address provided in the Matrix login response was not validated. A malicious or compromised homeserver could supply a file: URL, causing Thunderbird to redirect Matrix requests to local files or, on Windows, to an attacker-controlled network share, potentially leaking the user's NTLM credentials. This NTLM credential leak affects only Thunderbird on Windows. The issue was fixed in Thunderbird 159 and 153.6.

References

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