CVE-2025-1934

Name: CVE-2025-1934
Creator: NVD / NIST
Published: 2025-03-04T14:15:38.273+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.43%

Last modified Jun 17, 2026

CVE-2025-1934 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. It was possible to interrupt the processing of a RegExp bailout and run additional JavaScript, potentially triggering garbage collection when the engine was not expecting it. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

Description

It was possible to interrupt the processing of a RegExp bailout and run additional JavaScript, potentially triggering garbage collection when the engine was not expecting it. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.43%

34.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 128.8.0
Mozilla	Firefox	< 136.0
Mozilla	Thunderbird	< 128.8.0
Mozilla	Thunderbird	>= 129.0, < 136.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1942881Issue Tracking, Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-14/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-16/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-17/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-18/Vendor Advisory
https://lists.debian.org/debian-lts-announce/2025/03/msg00006.html

Timeline

Published: Mar 4, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-1934?

How severe is CVE-2025-1934?

CVE-2025-1934 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.

How do I fix CVE-2025-1934?

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-2025-1934?

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

Scan your code now

Source: NVD / NIST