CVE-2023-4050

Name: CVE-2023-4050
Creator: NVD / NIST
Published: 2023-08-01T15:15:10.09+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 13.69%

Last modified Jun 17, 2026

CVE-2023-4050 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In some cases, an untrusted input stream was copied to a stack buffer without checking its size. This resulted in a potentially exploitable crash which could have led to a sandbox escape. EPSS estimates a 13.69% chance of exploitation in the next 30 days.

Description

In some cases, an untrusted input stream was copied to a stack buffer without checking its size. This resulted in a potentially exploitable crash which could have led to a sandbox escape. This vulnerability affects Firefox < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

13.69%

96.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 116.0
Mozilla	Firefox	>= 102.0, < 102.14
Mozilla	Firefox	>= 115.0, < 115.1
Debian	Debian Linux	11.0
Debian	Debian Linux	12.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1843038Issue Tracking, Permissions Required
https://lists.debian.org/debian-lts-announce/2023/08/msg00008.html
https://lists.debian.org/debian-lts-announce/2023/08/msg00010.html
https://www.debian.org/security/2023/dsa-5464Third Party Advisory
https://www.debian.org/security/2023/dsa-5469Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2023-29/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-30/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-31/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1843038Issue Tracking, Permissions Required
https://lists.debian.org/debian-lts-announce/2023/08/msg00008.html
https://lists.debian.org/debian-lts-announce/2023/08/msg00010.html
https://www.debian.org/security/2023/dsa-5464Third Party Advisory
https://www.debian.org/security/2023/dsa-5469Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2023-29/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-30/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-31/Vendor Advisory

Timeline

Published: Aug 1, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-4050?

How severe is CVE-2023-4050?

CVE-2023-4050 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 13.69% probability of exploitation in the next 30 days.

How do I fix CVE-2023-4050?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-4050?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST