Track vulnerabilities like this one. Sign up free to get alerted when software you use is affected.

CVE-2026-110628: Kan 0.5.5‑0.6.0 lets remote users read internal resources

CVE-2026-110628 · published 1 day ago

Summary

Versions 0.5.5 through 0.6.0 of the Kan application let anyone on the internet send a specially crafted request that makes the server retrieve data from inside your network, such as local services or cloud metadata. This can expose sensitive configuration details without requiring a login. Upgrade to a newer version or configure the S3_ENDPOINT setting so the feature is properly restricted.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software

Vendor	Product	Affected versions
kanbn	kan	<= 0.6.0

Original advisory text

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

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.

References

https://hackmd.io/@leediay/HyIxU63ofg Vendor Advisory
https://github.com/kanbn/kan/pull/590 Patch
https://github.com/kanbn/kan/blob/v0.6.0/apps/web/src/pages/api/download/attatch... Third Party Advisory
https://github.com/kanbn/kan/blob/v0.6.0/.env.example#L25-L27 Third Party Advisory
https://github.com/kanbn/kan/security/advisories/GHSA-qrx8-9hc6-jvqg Vendor Advisory
https://github.com/kanbn/kan/commit/53397d8e81dc1494d94132848c1f0416f1152bd7 Patch
https://github.com/kanbn/kan Product
https://www.vulncheck.com/advisories/kan-0.5.5-through-0.6.0-unauthenticated-ssr... Vendor Advisory
https://github.com URL
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-1106... Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-110628 Vendor Advisory

Fix within

Internet-facing 14 days

Internal 60 days

Not known to be exploited
Can be exploited automatically (estimated)
Gives an attacker partial control (estimated)

Severity

8.3 High

Exploitation

<1% chance of attack within 30 days

Type

CWE-918Server-Side Request Forgery (SSRF)

Timeline

Published14 Oct 2026

Updated15 Oct 2026

First seen14 Oct 2026

Sources

CVE-2026-110628 · NVD

CVE-2026-110628 · MITRE

CVE-2026-110628 · OSV

Track software like this

Free during beta