CVE-2023-1521

Name: CVE-2023-1521
Creator: NVD / NIST
Published: 2024-11-26T12:15:18.203+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.36%

Last modified Jun 17, 2026

CVE-2023-1521 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. On Linux the sccache client can execute arbitrary code with the privileges of a local sccache server, by preloading the code in a shared library passed to LD_PRELOAD. If the server is run as root (which is the default when installing the snap package https://snapcraft.io/sccache ), this means a user running the sccache client can get root privileges.. EPSS estimates a 0.36% chance of exploitation in the next 30 days.

Description

On Linux the sccache client can execute arbitrary code with the privileges of a local sccache server, by preloading the code in a shared library passed to LD_PRELOAD. If the server is run as root (which is the default when installing the snap package https://snapcraft.io/sccache ), this means a user running the sccache client can get root privileges.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.36%

27.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-426

Affected Software

Vendor	Product	Versions
Mozilla	Sccache	< 0.4.0

References

https://github.com/advisories/GHSA-x7fr-pg8f-93f5Third Party Advisory
https://securitylab.github.com/advisories/GHSL-2023-046_ScCacheExploit

Timeline

Published: Nov 26, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-1521?

How severe is CVE-2023-1521?

CVE-2023-1521 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.36% probability of exploitation in the next 30 days.

How do I fix CVE-2023-1521?

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-2023-1521?

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

Scan your code now

Source: NVD / NIST