CVE-2026-9054

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.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited 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

0.29% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 21.5% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:A/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:Y/R:A/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-07-23.

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

2026-05-22 03:21Z5 MO AGO

Last updated

2026-05-22 17:15Z5 MO AGO

Reserved

2026-05-19

Assigning CNA

9front

Record state

PUBLISHED

Severity

Critical (CVSS 9.2)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:A/AU:Y/R:A

Weaknesses

• CWE-130Improper Handling of Length Parameter InconsistencyBase

Data version

5.2

Document digest

09a6dede8117a03b771046155f3da4984bce96aeb71b5f5293270bf8a969f20b

• git.9front.orghttps://git.9front.org/plan9front/9front/7838d68969549f938cc8e80c0c2b4218cb12805c/commit.htmlmitigation
• git.9front.orghttps://git.9front.org/plan9front/9front/f86917b75e9562f90545b7e484dbdcd748236952/commit.htmlmitigation
• git.9front.orghttps://git.9front.org/plan9front/9front/70c97c334171c715df82774d1a47638abaca2db4/commit.htmlmitigation