CVE-2023-1521

HIGH 7.8CVE-2023-1521 · Published 26/11/2024 · updated 17/06/2026

In short

CVE-2023-1521 is a HIGH (CVSS 7.8) vulnerability affecting sccache (mozilla).
Chance of exploitation in the next 30 days (EPSS): 0.36%, higher than 30.3% of all vulnerabilities.
Fix: update to 0.4.0 or later.

Package	Affected versions	Patched versions
sccache mozilla	`< 0.4.0`	`0.4.0`

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.

References

GitHub Advisory GHSA-x7fr-pg8f-93f5 · Third Party Advisory
securitylab.github.com/advisories/GHSL-2023-046_ScCache · Exploit

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