CVE-2026-77956

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• 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

0.28% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 20.4% of scored records. A rank, not a probability.

NVD base score

8.9 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-09-01.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2026-08-31 00:56Z2 MO AGO

Last updated

2026-08-31 16:01Z1 MO AGO

Reserved

2026-08-30

Assigning CNA

EEF

Record state

PUBLISHED

Severity

High (CVSS 8.9)

CNA CVSS vector

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Weaknesses

• CWE-94Improper Control of Generation of Code ('Code Injection')Base

Data version

5.2

Document digest

72398da09aec2355b1093361b09c8f0407d0acab126fa4db5043df37a8c041fa

• github.comhttps://github.com/ash-project/ash_ai/security/advisories/GHSA-2g59-hg7m-qc83vendor-advisoryrelated
• cna.erlef.orghttps://cna.erlef.org/cves/CVE-2026-77956.htmlrelated
• osv.devhttps://osv.dev/vulnerability/EEF-CVE-2026-77956related
• github.comhttps://github.com/ash-project/ash_ai/commit/e9948254b5659c1143b73dc2f59f457931e64514patch