PatchTheCVECVE-2026-32255: Kan is an open-source project management tool
CVE-2026-32255 is a high-severity flaw (CVSS 8.6) affecting kan. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 and passes it directly to fetch() server-side, and returns the full response body. An unauthenticated attacker can use this to make HTTP requests from the server to internal services, cloud metadata endpoints, or
Why this priority
- High severity
- EPSS top 2%: very likely to be exploited
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.6 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 26.4% (top 2%) |
| CISA exploited list | No |
| Weakness | CWE-918 |
| Published | 2026-03-19 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Exact fixes by distribution
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- GitHub PoC: kOaDT/poc-cve-2026-32255 (2 stars)
- Nuclei scan template: Kan <= 0.5.4 - Server-Side Request Forgery
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-32255?
kan: upgrade to 0.5.5. Exact commands for each OS are on this page.
Is CVE-2026-32255 being exploited?
CVE-2026-32255 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-32255 affect?
CVE-2026-32255 affects kan. Severity is high (CVSS 8.6). 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 and
How urgent is CVE-2026-32255?
Priority 60/100. High severity; EPSS top 2%: very likely to be exploited; Remotely exploitable, no login, no user action