LowVulnerability

CVE-2026-14742: langchain-ai langgraph Task Result Cache weak hash via default_cache_key

Source: NVD(opens in a new tab)
Identifier: CVE-2026-14742
Published: July 5, 2026
Record updated: October 9, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.2%

Summary

A flaw was found in langchain-ai langgraph up to 1.2.4. The _freeze function in libs/langgraph/langgraph/_internal/_cache.py, part of the Task Result Cache component, uses a weak hash when handling the default_cache_key argument. The attack can be carried out remotely, but its complexity is rather high and exploitability is described as difficult. A public exploit exists.

Mitigation

The pull request to fix this issue awaits acceptance.

Details

Scores and exploitation

CVSS score: 3.1(low)
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector: network
Attack complexity: high
Privileges required: low
User interaction: none
EPSS: 0.2%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on October 12, 2026.
Disclosure date: July 5, 2026

Weaknesses and techniques

Weakness (CWE): CWE-327
CWE-328
Attack pattern (CAPEC): CAPEC-20

Affected

Vendors: LangChain

Classification

Attack type: Other
Attack sophistication: Advanced
AI component targeted: Framework
Impact: Integrity
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-14742

First tracked: July 5, 2026 at 08:07 AM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 85% (self-assessed)

Summary

Mitigation

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