🛡️ CVE-2026-2806 on Ubuntu — mozjs102

Distribution advisory

This page covers CVE-2026-2806 as tracked by Ubuntu, for the package mozjs102. No fixed version has been recorded for this distribution yet.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: None.
• Availability impact: High — total loss, or loss the attacker controls.

Weakness class

UBUNTU-CVE-2026-2806 is classified as CWE-908: Use of Uninitialized Resource. A resource is read before being initialised, so its contents are whatever was left there.

Affected software

UBUNTU-CVE-2026-2806 is recorded against 8 packages.

• mozjs102
• mozjs115
• mozjs38
• mozjs52
• mozjs68
• mozjs78
• mozjs91
• thunderbird

Timeline and source

Published on 24 February 2026 and last revised on 29 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

ubuntu.com (Report)
www.cve.org (Report)
www.mozilla.org (Report)
bugzilla.mozilla.org (Report)
www.mozilla.org (Report)
www.mozilla.org (Report)

Same weakness in other software

These advisories are the same class of weakness (CWE-908: Use of Uninitialized Resource) in other software:

• CVE-2026-6368 (published 10 Aug 2026)
• CVE-2026-70631 (5.5 Medium, published 6 Aug 2026)
• CVE-2026-70630 (5.5 Medium, published 6 Aug 2026)
• CVE-2026-70629 (5.5 Medium, published 6 Aug 2026)
• CVE-2026-68744 (3.3 Low, published 4 Aug 2026)
• CVE-2026-64220 (5.5 Medium, published 24 Jul 2026)
• CVE-2026-66038 (6.5 Medium, published 24 Jul 2026)
• CVE-2026-16384 (7.5 High, published 21 Jul 2026)

CVE-2026-2806 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Affected Packages

References