No access to your tenant or devices. Every item links to its source. What this means
Claude Code is an agentic coding tool. Prior to 2.1.251, the Edit tool validates a target using pathname and symlink resolution that is not bound to the underlying directory inode or file descriptor. On macOS, attacker-controlled code running in the Bash sandbox can atomically replace an in-workspace parent directory with a symlink after validation, causing the unsandboxed Edit implementation to overwrite a user-writable file outside the workspace. Exploitation requires attacker-controlled code to run inside the sandbox, such as from a malicious repository or dependency script. This issue is fixed in version 2.1.251.
Read the publisher's advisoryClaude Code is an agentic coding tool. Prior to 2.1.251, the Edit tool validates a target using pathname and symlink resolution that is not bound to the underlying directory inode or file descriptor. On macOS, attacker-controlled code running in the Bash sandbox can atomically replace an in-workspace parent directory with a symlink after validation, causing the unsandboxed Edit implementation to overwrite a user-writable file outside the workspace. Exploitation requires attacker-controlled code to run inside the sandbox, such as from a malicious repository or dependency script. This issue is fixed in version 2.1.251.
Read the publisher's advisoryClaude Code is an agentic coding tool. Prior to 2.1.251, the Edit tool validates a target using pathname and symlink resolution that is not bound to the underlying directory inode or file descriptor. On macOS, attacker-controlled code running in the Bash sandbox can atomically replace an in-workspace parent directory with a symlink after validation, causing the unsandboxed Edit implementation to overwrite a user-writable file outside the workspace. Exploitation requires attacker-controlled code to run inside the sandbox, such as from a malicious repository or dependency script. This issue is fixed in version 2.1.251.
Read the publisher's advisoryClaude Code validated Edit tool targets using point-in-time pathname and symlink resolution that was not bound to the underlying directory inodes or file descriptors. On macOS, a process running inside Claude Code's Bash sandbox could exploit the resulting time-of-check to time-of-use window by atomically swapping an in-workspace parent directory with a symlink after validation completed, causing the unsandboxed Edit implementation to overwrite an attacker-selected user-writable file outside the workspace. Exploiting this required the ability to run attacker-controlled code inside the sandbox, such as through a malicious repository or dependency script. Users on standard Claude Code auto-update have received this fix automatically. Users performing manual updates are advised to update to the latest version. Claude Code thanks hackerone.com/mahoraga007 (Sunder Singh) for reporting this issue.
Read the publisher's advisoryVendor product
Shown as published. These rules are not interpreted as NuGet package version ranges.
{
"vendor": "anthropics",
"product": "claude-code",
"versions": [
{
"version": "< 2.1.251",
"status": "affected"
}
]
}Original source record · Cite this exact observation · Complete original publisher JSON
EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.
datePublished: Nov 3, 2026, 8:08:47 PM
dateUpdated: Nov 3, 2026, 9:29:17 PM
No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.
Original source record · Cite this exact observation · Complete original publisher JSON
NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.
Source analysis status: Awaiting Analysis
Weakness classifications: CWE-59 · CWE-367
published: 2026-11-03T20:18:19.010
lastModified: 2026-11-03T22:19:50.413
No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.
Original source record · Cite this exact observation · Complete original publisher JSON
npm
SEMVER · introduced 0 → fixed 2.1.251
Original source record · Cite this exact observation · Complete original publisher JSON