CVE-2026-45136
RCE in Claude Code cache proxy (3.5.0–3.5.1) via crafted payload.
Is CVE-2026-45136 being exploited?
Not confirmed. CVE-2026-45136 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.19% probability of exploitation in the next 30 days.
How severe is CVE-2026-45136?
CVE-2026-45136 is rated High with a CVSS score of 8.6. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-45136?
Yes. A fix has been recorded for CVE-2026-45136. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-45136 affect?
CVE-2026-45136 affects claude-code-cache-fix 3.5.0–3.5.1, tools/quota-statusline.sh 3.5.0. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-45136?
Upgrade to 3.5.2 or later
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Arbitrary code execution in Claude Code process via payload closing a Python triple-quoted string.
Patch when possible
- affected>= 3.5.0 and < 3.5.2
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.