Weak Hash Vulnerability in langchain-ai langgraph Product
CVE-2026-14742

2.3LOW

Key Information:

Vendor

Langchain-ai

Status
Langgraph
Vendor
CVE Published:
5 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-14742?

A vulnerability exists within langchain-ai's langgraph up to version 1.2.4 in the Task Result Cache component, specifically in the _freeze function located in _cache.py. This flaw arises from improper manipulation of the default_cache_key argument, leading to the implementation of a weak hash. Although the exploitation of this vulnerability requires a high level of complexity, it has been publicly disclosed, posing a risk of remote attacks. Fixing measures are in progress, pending acceptance of the pull request aimed at resolving this issue.

Affected Version(s)

langgraph 1.2.0

langgraph 1.2.1

langgraph 1.2.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-14742 - Proof of Concept

References

https://vuldb.com/vuln/376328
vdb-entrytechnical-description
https://vuldb.com/vuln/376328/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-14742
third-party-advisory

CVSS V4

Score:
2.3
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Dem0 (VulDB User)
VulDB CNA Team
.