CVE-2026-27794

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.83% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 57.4% of scored records. A rank, not a probability.

NVD base score

6.6 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Deferred. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-02-25 16:53Z8 MO AGO

Last updated

2026-02-25 21:00Z8 MO AGO

Reserved

2026-02-24

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 6.6)

CNA CVSS vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Weaknesses

• CWE-502Deserialization of Untrusted DataBase

Data version

5.2

Document digest

d79568dc7e4c313e5872aceaaa48b1ec1bc652343e5371f1b07afd0ebb4f59b1

• github.comhttps://github.com/langchain-ai/langgraph/security/advisories/GHSA-mhr3-j7m5-c7c9x_refsource_CONFIRM
• github.comhttps://github.com/langchain-ai/langgraph/pull/6677x_refsource_MISC
• github.comhttps://github.com/langchain-ai/langgraph/commit/f91d79d0c86932ded6e3b9f195d5a0bbd5aef99cx_refsource_MISC
• github.comhttps://github.com/langchain-ai/langgraph/releases/tag/checkpoint%3D%3D4.0.0x_refsource_MISC