124 lines
5.4 KiB
JSON
124 lines
5.4 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-103435",
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"assignerOrgId": "98a01053-8a31-4f6d-9aa9-252be161adc6",
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"state": "PUBLISHED",
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"assignerShortName": "Anthropic",
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"dateReserved": "2026-09-30T15:35:18.777Z",
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"datePublished": "2026-10-07T12:50:02.572Z",
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"dateUpdated": "2026-10-07T14:39:13.225Z"
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},
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"containers": {
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"cna": {
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"descriptions": [
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{
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"lang": "en",
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"value": "Claude Code validated that a target file path resided within the project working directory at permission-check time, but re-resolved the path at write time without repeating that validation. This time-of-check to time-of-use (TOCTOU) gap allowed an attacker who could write to the workspace to atomically replace a project file with a symlink, causing Claude Code to follow the symlink and write its output to an arbitrary file outside the project sandbox. Exploitation required the ability to win a race condition against the write operation and write access to the shared workspace, enabling a lower-privileged attacker to redirect benign edits to sensitive files (e.g., shell configuration) in a higher-privileged session.\n\nUsers on standard Claude Code auto-update have received this fix already. Users performing manual updates are advised to update to the latest version.\n\nThank you to hackerone.com/c_h4ck_0 for reporting this issue."
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}
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],
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"affected": [
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{
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"vendor": "Anthropic",
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"product": "@anthropic-ai/claude-code",
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"versions": [
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{
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"version": "0",
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"lessThan": "2.1.129",
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"status": "affected",
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"versionType": "semver"
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}
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]
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-22",
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"description": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')"
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}
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]
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},
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-61",
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"description": "CWE-61 UNIX Symbolic Link (Symlink) Following"
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}
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]
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},
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-367",
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"description": "CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition"
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}
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]
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}
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],
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"references": [
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{
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"url": "https://github.com/anthropics/claude-code/security/advisories/GHSA-5j29-h97v-84ch"
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}
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],
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"metrics": [
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{
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"cvssV4_0": {
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"version": "4.0",
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
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"baseScore": 7.7,
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"baseSeverity": "HIGH"
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}
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}
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],
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"title": "Arbitrary File Write via Write-Time Symlink Following (TOCTOU) in Claude Code",
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"providerMetadata": {
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"orgId": "98a01053-8a31-4f6d-9aa9-252be161adc6",
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"shortName": "Anthropic",
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"dateUpdated": "2026-10-07T12:50:02.572Z"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-10-07T14:39:02.916533Z",
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"id": "CVE-2026-103435",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-07T14:39:13.225Z"
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}
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}
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]
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}
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} |