CVE-2026-27589

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 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

0.19% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 9.1% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

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

2026-02-24 16:30Z8 MO AGO

Last updated

2026-02-27 20:51Z8 MO AGO

Reserved

2026-02-20

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 6.9)

CNA CVSS vector

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

Weaknesses

• CWE-352Cross-Site Request Forgery (CSRF)Compound

Data version

5.2

Document digest

b9d86af2d4d8df1aa1b7b191c2d4b10dcd581b00ad1faa8318be0e4088c4e5eb

• github.comhttps://github.com/caddyserver/caddy/security/advisories/GHSA-879p-475x-rqh2x_refsource_CONFIRM
• github.comhttps://github.com/caddyserver/caddy/releases/tag/v2.11.1x_refsource_MISC
• github.comhttps://github.com/user-attachments/files/25079818/poc.zipx_refsource_MISC
• github.comhttps://github.com/user-attachments/files/25079820/PR_DESCRIPTION.mdx_refsource_MISC