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TI-2023-01435 Aliases CVE-2023-1521GHSA-x7fr-pg8f-93f5

Local Privilege Escalation in sccache

Priority LOW 36CWE-426Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-426.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00363 30th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed sccache (Mozilla): 0.4.0sccache (crates.io): 0.4.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Mozillasccachebefore 0.4.00.4.0Patch availableCNA
—sccache (crates.io)before 0.4.00.4.0Patch availableGHSA-x7fr-pg8f-93f5
  • sccache VendorMozilla Affected before 0.4.0 Fixed in 0.4.0 Patch available CNA
  • sccache (crates.io) Vendor— Affected before 0.4.0 Fixed in 0.4.0 Patch available GHSA-x7fr-pg8f-93f5

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:sccache:*:*:*:*:*:rust:*:*before 0.4.0VulnerableMozilla
  • cpe:2.3:a:mozilla:sccache:*:*:*:*:*:rust:*:* Versions before 0.4.0 Vulnerable ·Mozilla

Remediation

  • Fix · CNA sccache (Mozilla) Fixed in 0.4.0
  • Fix · GHSA-x7fr-pg8f-93f5 sccache (crates.io) Fixed in 0.4.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-1521
  2. 2026-10-03 Alias added: GHSA-x7fr-pg8f-93f5

References

Exploit 1

Advisory 2

Other 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences