What is CVE-2026-32255?

CVE-2026-32255 is a high-severity vulnerability in Kanbn Kan, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.6/10. Published 2026-03-18.

How severe is CVE-2026-32255?

High severity. CVSS v3 base score is 8.6 out of 10.

Is CVE-2026-32255 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

SSRF in Kanbn Kan

CVE-2026-32255

Kan is an open-source project management tool. In versions 0.5.4 and below, the /api/download/attatchment endpoint has no authentication and no URL validation. The Attachment Download endpoint accepts a user-supplied URL query parameter an…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.001 (22.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.

Affected products

Kanbn Kan — versions < 0.5.5

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

Public proof-of-concept exploits

kOaDT/poc-cve-2026-32255

References

https://github.com/kanbn/kan/security/advisories/GHSA-qrx8-9hc6-jvqg (x_refsource_CONFIRM)
https://github.com/kanbn/kan/commit/53397d8e81dc1494d94132848c1f0416f1152bd7 (x_refsource_MISC)
https://github.com/kanbn/kan/releases/tag/v0.5.5 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-32255?: CVE-2026-32255 is a high-severity vulnerability in Kanbn Kan, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.6/10. Published 2026-03-18.
How severe is CVE-2026-32255?: High severity. CVSS v3 base score is 8.6 out of 10.
Is CVE-2026-32255 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.