---
title: "CVE-2026-110628: Kan - Server Side Request Forgery"
description: "Kan 0.5.5 through 0.6.0 contains an unauthenticated server-side request forgery caused by incomplete fix in /api/download/attatchment route, letting attackers read internal services and metadata, exploit requires S3_ENDPOINT unset."
url: https://panop.io/threat-heartbeat/CVE-2026-110628/
---

# CVE-2026-110628 Kan - Server Side Request Forgery

Kan 0.5.5 through 0.6.0 contains an unauthenticated server-side request forgery caused by incomplete fix in /api/download/attatchment route, letting attackers read internal services and metadata, exploit requires S3\_ENDPOINT unset.

CVSS base score 8.6 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-110628)

## Details

Type

Server Side Request Forgery

Impact

Information Disclosure

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Published

14 October 2026

Updated

15 October 2026

Weakness

[CWE-918](https://cwe.mitre.org/data/definitions/918.html)

## Vendor fix

Update to a version later than 0.6.0 or apply the complete fix for CVE-2026-32255.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-110628](https://nvd.nist.gov/vuln/detail/CVE-2026-110628)
- [https://github.com/kanbn/kan/commit/53397d8e81dc1494d94132848c1f0416f1152bd7](https://github.com/kanbn/kan/commit/53397d8e81dc1494d94132848c1f0416f1152bd7)
- [https://github.com/kanbn/kan/pull/590](https://github.com/kanbn/kan/pull/590)
- [https://github.com/kanbn/kan/security/advisories/GHSA-qrx8-9hc6-jvqg](https://github.com/kanbn/kan/security/advisories/GHSA-qrx8-9hc6-jvqg)
- [https://hackmd.io/@leediay/HyIxU63ofg](https://hackmd.io/@leediay/HyIxU63ofg)
- [https://www.vulncheck.com/advisories/kan-0.5.5-through-0.6.0-unauthenticated-ssrf-via-api-download-attatchment](https://www.vulncheck.com/advisories/kan-0.5.5-through-0.6.0-unauthenticated-ssrf-via-api-download-attatchment)
- [https://github.com/kanbn/kan](https://github.com/kanbn/kan)
- [https://github.com/kanbn/kan/blob/v0.6.0/.env.example#L25-L27](https://github.com/kanbn/kan/blob/v0.6.0/.env.example#L25-L27)
- [https://github.com/kanbn/kan/blob/v0.6.0/apps/web/src/pages/api/download/attatchment.ts#L21-L52](https://github.com/kanbn/kan/blob/v0.6.0/apps/web/src/pages/api/download/attatchment.ts#L21-L52)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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