CVE-2026-118178: Mozjs52 · A remote RSS feed could use the itunes:new-feed-url or newLocation element to permanently
Affects mozjs52Source GCVE Database
Not known to be exploited · CVSS 5.7 Medium · fixed in 153.6 : update mozjs52 when convenient.
Data as of 6 Nov 2026, 05:05 UTC
Thin evidence
One scorer or none| CISA-ADP | CVSS 3.1 | 5.7 |
|---|
- Patch
- Available – fixed in 153.6
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 27 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 5 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 24.04 LTSmozjs102pkg:deb/ubuntu/mozjs102?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSmozjs115pkg:deb/ubuntu/mozjs115?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 22.04 LTSmozjs102pkg:deb/ubuntu/mozjs102?arch=source&distro=jammyOther threats | Affected
| Fixed in– |
Ubuntu 22.04 LTSmozjs78pkg:deb/ubuntu/mozjs78?arch=source&distro=jammyOther threats | Affected
| Fixed in– |
Ubuntu 22.04 LTSmozjs91pkg:deb/ubuntu/mozjs91?arch=source&distro=jammyOther threats | Affected
| Fixed in– |
Ubuntu 22.04 LTSthunderbirdpkg:deb/ubuntu/thunderbird?arch=source&distro=jammyOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
This vulnerability is fixed in Thunderbird version 153.6. Users and administrators should upgrade to Thunderbird 153.6 or later to remediate this issue. No additional mitigations are required once the update is applied.
Description
A vulnerability in Thunderbird allows a remote RSS feed to use the itunes:new-feed-url or newLocation element to permanently change its stored subscription URL to a local file URL. This causes Thunderbird to read local files on every feed update. On Windows, this can also cause Thunderbird to connect to an attacker-controlled network share, potentially leaking the user's NTLM credentials. The issue affects Thunderbird versions prior to 153.6 and was fixed in Thunderbird 153.6.
References
- ubuntu.com/security/CVE-2026-118178 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-118178 (opens in a new tab)
- mozilla.org/en-US/security/advisories/mfsa2026-122/ (opens in a new tab)
- bugzilla.mozilla.org/show_bug.cgi?id=2075772 (opens in a new tab)
- mozilla.org/security/advisories/mfsa2026-121/ (opens in a new tab)
- mozilla.org/security/advisories/mfsa2026-122/ (opens in a new tab)