CVE-2026-45136

Name: CVE-2026-45136
Creator: NVD / NIST
Published: 2026-05-27T21:16:18.523+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 0.19%

Last modified Jun 17, 2026

CVE-2026-45136 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. 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. EPSS estimates a 0.19% chance of exploitation in the next 30 days.

Description

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 3.1

7.8/10

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

CVSS 4.0

8.6/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.19%

8.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cnighswonger	Claude-Code-Cache-Fix	>= 3.5.0, < 3.5.2

References

https://github.com/cnighswonger/claude-code-cache-fix/issues/108Exploit, Issue Tracking
https://github.com/cnighswonger/claude-code-cache-fix/pull/110Issue Tracking, Patch
https://github.com/cnighswonger/claude-code-cache-fix/security/advisories/GHSA-g3xq-3gmv-qq8gMitigation, Vendor Advisory
https://github.com/cnighswonger/claude-code-cache-fix/issues/108Exploit, Issue Tracking
https://github.com/cnighswonger/claude-code-cache-fix/security/advisories/GHSA-g3xq-3gmv-qq8gMitigation, Vendor Advisory

Timeline

Published: May 27, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-45136?

How severe is CVE-2026-45136?

CVE-2026-45136 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 0.19% probability of exploitation in the next 30 days.

How do I fix CVE-2026-45136?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-45136?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST