How severe is CVE-2026-32255?

CVE-2026-32255 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-32255 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-32255?

CVE-2026-32255 affects Kan. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-32255?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-32255 have an EU (EUVD) identifier?

Yes. CVE-2026-32255 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12997.

When was CVE-2026-32255 published?

CVE-2026-32255 was published on 2026-03-19 and last updated on 2026-06-17.

CVE-2026-32255

CVE-2026-32255 is a high-severity vulnerability in Kan with a CVSS 3.x base score of 8.6. Its EPSS exploit-prediction score of 10% places it in the 95th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-918.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 10% (95th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12997
Weakness: CWE-918
Affected product: Kan
Published: 2026-03-19
Last modified: 2026-06-17

Description

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 private network resources. This issue has been fixed in version 0.5.5. To workaround this issue, block or restrict access to /api/download/attatchment at the reverse proxy level (nginx, Cloudflare, etc.).

Frequently asked questions

What is CVE-2026-32255?: 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 private network resources. This issue has been fixed in version 0.5.5. To workaround this issue, block or restrict access to /api/download/attatchment at the reverse proxy level (nginx, Cloudflare, etc.).
How severe is CVE-2026-32255?: CVE-2026-32255 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-32255 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-32255?: CVE-2026-32255 affects Kan. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-32255?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-32255 have an EU (EUVD) identifier?: Yes. CVE-2026-32255 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12997.
When was CVE-2026-32255 published?: CVE-2026-32255 was published on 2026-03-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:kan:kan:*:*:*:*:*:*:*:*

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