CVE-2025-68665

HIGHNVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.6 under NVD CVSS v3. EPSS exploit probability: 0.8%, top 48% 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
Elevated
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.6Exploit: Elevated riskExposed: 0

A fix is available — apply it.

LangChain is a framework for building LLM-powered applications. Prior to @langchain/core versions 0.3.80 and 1.1.8, and prior to langchain versions 0.3.37 and 1.2.3, a serialization injection vulnerability exists in LangChain JS's toJSON() method (and subsequently when string-ifying objects using JSON.stringify(). The method did not escape objects with 'lc' keys when serializing free-form data in kwargs. The 'lc' key is used internally by LangChain to mark serialized objects. When user-controlled data contains this key structure, it is treated as a legitimate LangChain object during deserialization rather than plain user data. This issue has been patched in @langchain/core versions 0.3.80 and 1.1.8, and langchain versions 0.3.37 and 1.2.3

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
70(Attend)
EG Risk 70/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity86% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
55%
KEV
Not listed

Published

December 23, 2025

Last Modified

January 13, 2026

Advisory Details (3)

Auto-updated Aug 8, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

LangChain serialization injection vulnerability enables secret extraction · Advisory · langchain-ai/langchainjs · GitHub

https://github.com/langchain-ai/langchainjs/security/advisories/GHSA-r399-636x-v7f6
github_release Patch Available

[email protected]

Patch available: langchain-ai/langchainjs [email protected]

https://github.com/langchain-ai/langchainjs/releases/tag/langchain%401.2.3
github_commit Patch Available

commit e5063f9c6e99 (langchain-ai/langchainjs)

Patch available: langchain-ai/langchainjs @langchain/[email protected] (contains commit e5063f9c6e99)

https://github.com/langchain-ai/langchainjs/commit/e5063f9c6e9989ea067dfdff39262b9e7b6aba62

Vendor Advisories for CVE-2025-68665(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhoai/odh-llama-stack-core-rhel9:17714156612026-03-04redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(2 across 1 ecosystem)
npm(2)
PackageVulnerable rangeFixed inDependents
langchain—0.3.37—
@langchain/core—0.3.80—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× 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.

Showing the most recent 100 of 154 total refreshes for this CVE.

  1. 2026-09-18 19:27 UTCEPSS rescore
  2. 2026-09-17 19:30 UTCEPSS rescore
  3. 2026-09-16 14:07 UTCEPSS rescore
  4. 2026-09-16 05:14 UTCEPSS rescore
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  6. 2026-09-14 05:50 UTCOSV refresh
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  22. 2026-08-26 07:13 UTCOSV refresh
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  1. 2026-08-21 23:48 UTCEPSS rescore
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  3. 2026-08-19 17:03 UTCEPSS rescore
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  6. 2026-08-16 14:55 UTCEPSS rescore
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  11. 2026-08-11 13:42 UTCEPSS rescore
  12. 2026-08-10 23:59 UTCEPSS rescore
  13. 2026-08-09 22:58 UTCEG score recompute
  14. 2026-08-09 22:58 UTCVendor advisory
  15. 2026-08-09 13:46 UTCEPSS rescore
  16. 2026-08-08 16:36 UTCEPSS rescore
  17. 2026-08-08 05:30 UTCEG score recompute
  18. 2026-08-08 05:30 UTCVendor advisory
  19. 2026-08-07 16:27 UTCEPSS rescore
  20. 2026-08-06 13:46 UTCEPSS rescore
  21. 2026-08-06 07:20 UTCEG score recompute
  22. 2026-08-06 07:20 UTCVendor advisory
  23. 2026-08-05 19:17 UTCEPSS rescore
  24. 2026-08-04 10:37 UTCEPSS rescore
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  26. 2026-08-02 02:26 UTCEPSS rescore
  27. 2026-08-01 04:15 UTCEPSS rescore
  28. 2026-07-30 16:27 UTCEPSS rescore
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  30. 2026-07-27 14:13 UTCEPSS rescore
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  38. 2026-07-23 11:49 UTCOSV refresh
  39. 2026-07-23 03:02 UTCEG score recompute
  40. 2026-07-22 14:08 UTCEPSS rescore
  41. 2026-07-21 15:24 UTCEPSS rescore
  42. 2026-07-20 17:08 UTCEPSS rescore
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  64. 2026-07-06 07:02 UTCOSV refresh
  65. 2026-07-06 02:23 UTCEPSS rescore
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  68. 2026-07-04 06:31 UTCEPSS rescore
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  70. 2026-07-01 15:06 UTCEPSS rescore
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  73. 2026-06-29 14:06 UTCEPSS rescore
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  75. 2026-06-28 14:07 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2025-68665?
CVE-2025-68665 is a high vulnerability published on December 23, 2025. LangChain is a framework for building LLM-powered applications. Prior to @langchain/core versions 0.3.80 and 1.1.8, and prior to langchain versions 0.3.37 and 1.2.3, a serialization injection vulnerability exists in LangChain JS's toJSON() method (and subsequently when string-ifying objects using…
When was CVE-2025-68665 disclosed?
CVE-2025-68665 was first published in the National Vulnerability Database on December 23, 2025, with the most recent update on January 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-68665 actively exploited?
CVE-2025-68665 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 45.2% of all scored CVEs.
What is the CVSS score of CVE-2025-68665?
CVE-2025-68665 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2025-68665?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-68665, 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

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