🛡️ CVE-2026-16360 — firefox
Description
Memory safety bugs present in Firefox ESR 115.37, Firefox ESR 140.12 and Firefox 152. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
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 high, availability high.
Weakness class
CVE-2026-16360 is classified as CWE-119: Improper Restriction of Operations within Memory Buffer Bounds. A read or write is performed without confirming it stays inside the allocated buffer, corrupting adjacent memory.
Affected software
CVE-2026-16360 is recorded against 2 packages.
- firefox (from 128.1.0 up to 140.13.0)
- thunderbird (from 141.0 up to 153.0)
Timeline and source
Published on 21 July 2026 and last revised on 24 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.
References
bugzilla.mozilla.org
bugzilla.mozilla.org
www.mozilla.org
www.mozilla.org
www.mozilla.org
www.mozilla.org
www.mozilla.org
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| firefox | 128.1.0 | 140.13.0 |
| thunderbird | 141.0 | 153.0 |
References
Similar Threats
- Unknown ALSA-2022:8580
- Unknown ALSA-2022:8554
- Unknown ALSA-2022:7070
- Unknown ALSA-2022:7071
- Unknown ALSA-2022:7020
Exploit Protection
Are you running firefox?
CVE-2026-16360 carries CVSS 9.8 Critical rating. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.
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