How severe is GHSA-q728-gf8j-w49r?

No CVSS score has been assigned to GHSA-q728-gf8j-w49r yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-q728-gf8j-w49r?

GHSA-q728-gf8j-w49r affects the following packages: @anthropic-ai/claude-code (npm). Ecosystems affected: npm.

How do I fix GHSA-q728-gf8j-w49r?

Update @anthropic-ai/claude-code to 2.0.74 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-q728-gf8j-w49r is resolved across your whole dependency graph.

How do I detect GHSA-q728-gf8j-w49r in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for @anthropic-ai/claude-code, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-q728-gf8j-w49r if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against GHSA-q728-gf8j-w49r?

O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-q728-gf8j-w49r can be triaged on real exposure rather than presence alone.

Is GHSA-q728-gf8j-w49r actively exploited in the wild?

No public exploit code has been indexed for GHSA-q728-gf8j-w49r yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for GHSA-q728-gf8j-w49r?

GHSA-q728-gf8j-w49r has an EPSS (Exploit Prediction Scoring System) score of 0.5%, placing it in the 40th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

When was GHSA-q728-gf8j-w49r published, and has it been updated?

GHSA-q728-gf8j-w49r was published on February 3, 2026 and was last updated on February 4, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 npm

Not in CISA KEV

GHSA-q728-gf8j-w49r — @anthropic-ai/claude-code

GHSA-q728-gf8j-w49r is a security vulnerability in @anthropic-ai/claude-code. A fix is available for @anthropic-ai/claude-code — see the affected versions and patch details below.

Claude Code has a Path Restriction Bypass via ZSH Clobber which Allows Arbitrary File Writes

Also known asCVE-2026-24053

Published

Feb 3, 2026

Updated

Feb 4, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Sep 24, 2026 · OSV.dev, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

A successful exploit gives an attacker total control of the affected component, not partial access.
CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-q728-gf8j-w49r.

EPSS Exploitation Probability

via FIRST.org ↗

0.5%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs40th percentile — riskier than 40% of all scored CVEsHighest risk

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

276other npm packages depend on this — each one inherits the vulnerability until it's patched upstream

@anthropic-ai/claude-codenpm

8.7Mdownloads / week

Description

Users on standard Claude Code auto-update have received this fix already. Users performing manual updates are advised to update to the latest version.

Claude Code thanks https://hackerone.com/alexbernier for reporting this issue!

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`@anthropic-ai/claude-code`	all versions	2.0.74`npm install @anthropic-ai/claude-code@2.0.74`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for @anthropic-ai/claude-code, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update @anthropic-ai/claude-code to 2.0.74 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-q728-gf8j-w49r is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-q728-gf8j-w49r can be triaged on real exposure rather than presence alone.

Tailored to GHSA-q728-gf8j-w49r. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Due to a Bash command validation flaw in parsing ZSH clobber syntax, it was possible to bypass directory restrictions and write files outside the current working directory without user permission prompts. Exploiting this required the user to use ZSH and the ability to add untrusted content into a Claude Code context window. Users on standard Claude Code auto-update have received this fix already. Users performing manual updates are advised to update to the latest version. Claude Code thanks https://hackerone.com/alexbernier for reporting this issue!

O3 Security · Impact-Aware SCA

Is GHSA-q728-gf8j-w49r in your dependencies?

O3 Security finds GHSA-q728-gf8j-w49r across npm dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

Scan my dependencies How O3 SCA works