CVE-2023-5728

Name: CVE-2023-5728
Creator: NVD / NIST
Published: 2023-10-25T18:17:44.31+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.18%

Last modified Jun 17, 2026

CVE-2023-5728 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. During garbage collection extra operations were performed on a object that should not be. This could have led to a potentially exploitable crash. EPSS estimates a 1.18% chance of exploitation in the next 30 days.

Description

During garbage collection extra operations were performed on a object that should not be. This could have led to a potentially exploitable crash. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.

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

1.18%

63.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 119.0
Mozilla	Firefox Esr	< 115.4
Mozilla	Thunderbird	< 115.4.1
Debian	Debian Linux	10.0
Debian	Debian Linux	11.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1852729Issue Tracking, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00037.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00042.htmlMailing List, Third Party Advisory
https://www.debian.org/security/2023/dsa-5535Mailing List, Third Party Advisory
https://www.debian.org/security/2023/dsa-5538Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2023-45/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-46/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-47/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1852729Issue Tracking, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00037.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00042.htmlMailing List, Third Party Advisory
https://www.debian.org/security/2023/dsa-5535Mailing List, Third Party Advisory
https://www.debian.org/security/2023/dsa-5538Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2023-45/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-46/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-47/Vendor Advisory

Timeline

Published: Oct 25, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-5728?

How severe is CVE-2023-5728?

CVE-2023-5728 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.18% probability of exploitation in the next 30 days.

How do I fix CVE-2023-5728?

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-2023-5728?

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

Scan your code now

Source: NVD / NIST