CVE-2026-41686

MEDIUMNVD 4.44.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.4 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 98% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
4.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.4Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Claude SDK for TypeScript provides access to the Claude API from server-side TypeScript or JavaScript applications. From version 0.79.0 to before version 0.91.1, the BetaLocalFilesystemMemoryTool in the Anthropic TypeScript SDK created memory files and directories using the Node.js default modes (0o666 for files, 0o777 for directories), leaving them world-readable on systems with a standard umask and world-writable in environments with a permissive umask such as many Docker base images. A local attacker on a shared host could read persisted agent state, and in containerized deployments could modify memory files to influence subsequent model behavior. This issue has been patched in version 0.91.1.

CVSS v3
4.4
EG Score
4.4(medium)
EPSS
2.1%
KEV
Not listed

Published

May 4, 2026

Last Modified

May 12, 2026

Advisory Details (1)

Auto-updated May 4, 2026
Patch available. Sources: github.
github Patch Available

Claude SDK for TypeScript has Insecure Default File Permissions in Local Filesystem Memory Tool · Advisory · anthropics/anthropic-sdk-typescript · GitHub

https://github.com/anthropics/anthropic-sdk-typescript/security/advisories/GHSA-p7fg-763f-g4gf

Vendor Advisories for CVE-2026-41686(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
@anthropic-ai/sdk—0.91.1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 27× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-09 19:10 UTCEPSS rescore
  3. 2026-07-08 15:15 UTCEPSS rescore
  4. 2026-07-07 13:46 UTCEPSS rescore
  5. 2026-07-06 16:27 UTCEPSS rescore
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  7. 2026-07-04 06:31 UTCEPSS rescore
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  9. 2026-06-30 23:22 UTCEPSS rescore
  10. 2026-06-29 14:06 UTCEPSS rescore
  11. 2026-06-28 14:07 UTCEPSS rescore
  12. 2026-06-28 04:56 UTCEPSS rescore
  13. 2026-06-27 03:08 UTCEPSS rescore
  14. 2026-06-25 13:49 UTCEPSS rescore
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  16. 2026-06-24 14:05 UTCEPSS rescore
  17. 2026-06-23 21:33 UTCEPSS rescore
  18. 2026-06-21 01:59 UTCEPSS rescore
  19. 2026-06-18 17:52 UTCEPSS rescore
  20. 2026-06-18 17:52 UTCEPSS rescore
  21. 2026-06-17 17:53 UTCEPSS rescore
  22. 2026-06-16 17:52 UTCEPSS rescore
  23. 2026-06-15 17:49 UTCEPSS rescore
  24. 2026-06-14 08:06 UTCEG score recompute
  25. 2026-06-13 23:00 UTCEPSS rescore
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  1. 2026-06-12 23:12 UTCEPSS rescore
  2. 2026-06-12 23:12 UTCEPSS rescore
  3. 2026-06-12 03:44 UTCEG score recompute
  4. 2026-06-11 14:00 UTCEPSS rescore
  5. 2026-06-11 02:41 UTCEG score recompute
  6. 2026-06-10 22:18 UTCEPSS rescore
  7. 2026-06-10 13:22 UTCEPSS rescore
  8. 2026-06-10 13:22 UTCEPSS rescore
  9. 2026-06-09 23:37 UTCEG score recompute
  10. 2026-06-08 22:36 UTCEG score recompute
  11. 2026-06-08 14:17 UTCEPSS rescore
  12. 2026-06-08 14:17 UTCEPSS rescore
  13. 2026-06-07 16:08 UTCEG score recompute
  14. 2026-06-07 15:25 UTCEPSS rescore
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  16. 2026-06-06 15:06 UTCEG score recompute
  17. 2026-06-06 13:47 UTCEPSS rescore
  18. 2026-06-06 13:47 UTCEPSS rescore
  19. 2026-06-05 22:47 UTCEPSS rescore
  20. 2026-06-05 14:05 UTCEG score recompute
  21. 2026-06-05 06:10 UTCEPSS rescore
  22. 2026-06-05 06:10 UTCEPSS rescore
  23. 2026-06-04 13:12 UTCEPSS rescore
  24. 2026-06-04 13:12 UTCEPSS rescore
  25. 2026-06-04 13:04 UTCEG score recompute
  26. 2026-06-03 12:02 UTCEG score recompute
  27. 2026-06-02 20:13 UTCEPSS rescore
  28. 2026-06-02 11:00 UTCEG score recompute
  29. 2026-06-01 13:52 UTCEPSS rescore
  30. 2026-06-01 13:52 UTCEPSS rescore
  31. 2026-06-01 13:51 UTCEPSS rescore
  32. 2026-06-01 09:59 UTCEG score recompute
  33. 2026-05-31 22:30 UTCEPSS rescore
  34. 2026-05-31 22:30 UTCEPSS rescore
  35. 2026-05-31 00:16 UTCEPSS rescore
  36. 2026-05-31 00:16 UTCEPSS rescore
  37. 2026-05-31 00:16 UTCEPSS rescore
  38. 2026-05-29 13:44 UTCEPSS rescore
  39. 2026-05-29 13:44 UTCEPSS rescore
  40. 2026-05-28 13:44 UTCEPSS rescore
  41. 2026-05-28 13:44 UTCEPSS rescore
  42. 2026-05-28 13:44 UTCEPSS rescore
  43. 2026-05-27 13:40 UTCEPSS rescore
  44. 2026-05-27 13:40 UTCEPSS rescore
  45. 2026-05-27 13:40 UTCEPSS rescore
  46. 2026-05-26 13:44 UTCEPSS rescore
  47. 2026-05-26 07:18 UTCEPSS rescore
  48. 2026-05-26 07:18 UTCEPSS rescore
  49. 2026-05-23 00:08 UTCEG score recompute
  50. 2026-05-20 22:38 UTCEPSS rescore
  51. 2026-05-20 22:38 UTCEPSS rescore
  52. 2026-05-20 14:34 UTCEG score recompute
  53. 2026-05-20 11:22 UTCEPSS rescore
  54. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-41686?
CVE-2026-41686 is a medium vulnerability published on May 4, 2026. Claude SDK for TypeScript provides access to the Claude API from server-side TypeScript or JavaScript applications. From version 0.79.0 to before version 0.91.1, the BetaLocalFilesystemMemoryTool in the Anthropic TypeScript SDK created memory files and directories using the Node.js default modes…
When was CVE-2026-41686 disclosed?
CVE-2026-41686 was first published in the National Vulnerability Database on May 4, 2026, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41686 actively exploited?
CVE-2026-41686 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-41686?
CVE-2026-41686 has a CVSS v3 base score of 4.4 (NVD).
How do I remediate CVE-2026-41686?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41686, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-41686

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