Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2023-1521

25
FAUCET Score

CVE-2023-1521 is a high-severity vulnerability affecting the sccache client on Linux, allowing arbitrary code execution with the privileges of a local sccache server. This is achieved by preloading malicious code in a shared library via LD_PRELOAD, potentially leading to root privileges if the server is run as such (e.g., via the snap package). The vulnerability has a CVSS score of 7.8, indicating high impact on confidentiality, integrity, and availability, with low attack complexity and no user interaction required. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:sccache:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.36%
Probability of exploitation in next 30 days
EPSS Percentile
28.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0036 is in the 67th percentile among its peer group of 17,061 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

rustpatch availablevia ghsa
Product: sccacheFixed in: 0.4.0

Vendor Advisories (1)

rustGHSA-x7fr-pg8f-93f5high

sccache vulnerable to privilege escalation if server is run as root

May 30, 2023

References

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