RCE in Cnighswonger Claude-Code-Cache-Fix
CVE-2026-45136
claude-code-cache-fix is a cache optimization proxy for Claude Code. From 3.5.0 to before 3.5.2, tools/quota-statusline.sh (introduced in v3.5.0) interpolates Claude Code's hook stdin payload directly into a Python triple-quoted string literal. A ''' byte sequence in any user-controlled field of the payload closes the literal early and lets following bytes execute as Python in the user's Claude Code process. This vulnerability is fixed in 3.5.2.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (10.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 10.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Cnighswonger Claude-Code-Cache-Fix — versions >= 3.5.0, < 3.5.2
Weakness classification (CWE)
References
- github.com/cnighswonger/claude-code-cache-fix/security/advisories/GHSA-g3xq-3gm… (Mitigation, Vendor Advisory)
- github.com/cnighswonger/claude-code-cache-fix/issues/108 (Exploit, Issue Tracking)
- github.com/cnighswonger/claude-code-cache-fix/pull/110 (Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2026-45136?
- CVE-2026-45136 is a high-severity vulnerability in Cnighswonger Claude-Code-Cache-Fix, classified under OS Command Injection. CVSS score: 7.8/10. Published 2026-05-27.
- How severe is CVE-2026-45136?
- High severity. CVSS v3 base score is 7.8 out of 10.