Security readout for executives and security teams
Plain-English summary
CVE-2026-45136 affects claude-code-cache-fix, a Claude Code cache optimization proxy. Vulnerable versions can turn crafted local hook input into Python code execution inside the user’s Claude Code process. The issue is serious for developer workstations using affected versions, but the provided sources do not show active exploitation.
Executive priority
Treat this as a high-priority developer tooling fix. The affected component can run code in a user’s Claude Code process, which may expose source code, credentials, or workstation access. Scope is likely narrow, so focus on fast inventory and upgrade rather than broad emergency response.
Technical view
Versions 3.5.0 through before 3.5.2 introduced tools/quota-statusline.sh, which placed Claude Code hook stdin directly inside a Python triple-quoted string. A controlled field containing a Python string delimiter could break parsing and allow unintended Python execution. The project reports the issue fixed in 3.5.2.
Likely exposure
Exposure is limited to environments running cnighswonger/claude-code-cache-fix versions 3.5.0, 3.5.1, or any build before 3.5.2 that uses the quota statusline hook path. It is most relevant to developer machines or automation contexts where Claude Code hooks process local input.
Exploitation context
The CVSS vector indicates local attack surface, low complexity, no privileges, and no user interaction. The source bundle marks KEV as false and provides no cited evidence of exploitation in the wild, so active exploitation should not be assumed.
Researcher notes
The strongest evidence is the GitHub advisory plus linked issue and pull request. The record identifies affected versions, vulnerable file, vulnerability pattern, CVSS 4.0 score, and fixed version. The bundle does not provide evidence of public exploitation or additional affected products.
Mitigation direction
- Upgrade claude-code-cache-fix to version 3.5.2 or later.
- Remove or disable affected quota-statusline hook usage until upgraded.
- Check vendor advisory and release notes for any follow-up guidance.
- Prioritize developer endpoints and CI hosts using Claude Code workflows.
Validation and detection
- Inventory installed claude-code-cache-fix versions across developer and automation systems.
- Confirm no host remains on versions 3.5.0 through before 3.5.2.
- Review Claude Code hook configuration for tools/quota-statusline.sh usage.
- Verify the fixed package is actually used by active workflows.
- Check local logs for unexpected hook errors or Python execution symptoms.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-94: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-45136 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.6 (4.0)
- Known Exploited
- No
- Published
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
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
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——GitHub_MVulnerability scoring details
Base CVSS 4.0 score
8.6HighVector: 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
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/cnighswonger/claude-code-cache-fix/security/advisories/GHSA-g3xq-3gmv-qq8gCVE reference, GitHub_M · x_refsource_CONFIRM
- https://github.com/cnighswonger/claude-code-cache-fix/issues/108CVE reference, GitHub_M · x_refsource_MISC
- https://github.com/cnighswonger/claude-code-cache-fix/pull/110CVE reference, GitHub_M · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.