CVE-2026-110628CWE-918ssrf

CVE-2026-110628

High · published October 14, 2026

CVSS v3.1
8.6
EPSS
0%
Percentile
35.7
In the wild
Unconfirmed
What it is

Kan 0.5.5 through 0.6.0 contains an unauthenticated server-side request forgery vulnerability in the /api/download/attatchment route due to an incomplete fix for CVE-2026-32255. When S3_ENDPOINT is unset, attackers can pass arbitrary url query parameters to fetch() to read internal services, localhost ports, and cloud instance metadata.

The record
Technical detail
CVSS v3.1
8.6 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CVSS v4.0
9.2 · 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
EPSS
0.00425 · 35.7th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-10-14T19:17Z
References (8)
https://github.com/kanbn/kan · [email protected]https://github.com/kanbn/kan/blob/v0.6.0/.env.example#L25-L27 · [email protected]https://github.com/kanbn/kan/blob/v0.6.0/apps/web/src/pages/api/download/attatchment.ts#L21-L52 · [email protected]https://github.com/kanbn/kan/commit/53397d8e81dc1494d94132848c1f0416f1152bd7 · [email protected]https://github.com/kanbn/kan/pull/590 · [email protected]https://github.com/kanbn/kan/security/advisories/GHSA-qrx8-9hc6-jvqg · [email protected]https://hackmd.io/@leediay/HyIxU63ofg · [email protected]https://www.vulncheck.com/advisories/kan-0.5.5-through-0.6.0-unauthenticated-ssrf-via-api-download-attatchment · [email protected]
EPSS history
Timeline
  • 16 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 14 OCT 14:17Z
    Kan 0.5.5 through 0.6.0 Unauthenticated SSRF via /api/download/attatchment
    cvelistv5
  • 14 OCT 14:17Z
    Kan 0.5.5 through 0.6.0 Unauthenticated SSRF via /api/download/attatchment
    cvelistv5