CVE-2026-45136 PUBLISHED

claude-code-cache-fix: Local code execution via Python triple-quote injection in tools/quota-statusline.sh

Assigner: GitHub_M
Reserved: 08.05.2026 Published: 27.05.2026 Updated: 27.05.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
CVSS Score: 8.6

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	Low	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	cnighswonger
Product	claude-code-cache-fix
Versions	Version >= 3.5.0, < 3.5.2 is affected

References

Problem Types

CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') CWE
CWE-94: Improper Control of Generation of Code ('Code Injection') CWE