CVE-2026-110628: kanbn kan

Kan 0.5.5 through 0.6.0 Unauthenticated SSRF via /api/download/attatchment

CVSS 9.2 CriticalCriticalEPSS 0.0043 · 36th percentile

Critical, because:

CVSS score 9.2: 9.0 or more.

Published by the CVE Program (CNA: VulnCheck) at 14 Oct 2026, 14:17 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
kanbn	kan https://github.com pkg:github/kanbn/kan	affected 0.5.5 to 0.6.0, inclusive semver Other versions: unaffected

Identifiers

CVE-2026-110628

CNA

VulnCheck

Weakness (CWE)

CWE-918

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
9.2	Critical	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N	CNA (VulnCheck)Used for this record
8.6	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0043, the 36th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 14 Oct 2026. New records show when each source confirmed them.

Sources

References from the CNA

hackmd.io/@leediay/HyIxU63ofg third-party-advisory
github.com/kanbn/kan/pull/590 issue-trackingpatch
github.com/kanbn/kan/blob/v0.6.0/apps/web/src/pages/api/download/attatchment.ts#L21-L52 technical-description
github.com/kanbn/kan/blob/v0.6.0/.env.example#L25-L27 technical-description
github.com/kanbn/kan/security/advisories/GHSA-qrx8-9hc6-jvqg vendor-advisory
github.com/kanbn/kan/commit/53397d8e81dc1494d94132848c1f0416f1152bd7 patch
github.com/kanbn/kan product
www.vulncheck.com/advisories/kan-0.5.5-through-0.6.0-unauthenticated-ssrf-via-api-download-attatchment third-party-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.