CVE-2026-32255 (GCVE-0-2026-32255)

Vulnerability from cvelistv5 – Published: 2026-03-18 23:11 – Updated: 2026-03-19 16:11
VLAI Previdian
Title
Kan is Vulnerable to Unauthenticated SSRF via Attachment Download Endpoint
Summary
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.).
Severity
8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-19 16:10 UTC
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Vendor Product Version CPE status
kanbn kan Affected: < 0.5.5
guessed Create a notification for this product.
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: e5d8ada1-1a4a-4775-bf91-0b4b6a2616f2

Vulnerability ID: CVE-2026-32255

Status: Confirmed

Status Updated: 2026-09-17 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-09-17
Asserted: 2026-09-17
Scope
Notes: Kan is Vulnerable to Unauthenticated SSRF via Attachment Download Endpoint | Affected: Kanbn / kan | CVSS: 8.6 (HIGH) | EPSS: 0.20776 | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian

Details
Feed Previdian (previdian.com)
Title Kan is Vulnerable to Unauthenticated SSRF via Attachment Download Endpoint
Cve Id CVE-2026-32255
Vendor Kanbn
Ghsa Id None
Product kan
Added Date 2026-09-17T00:00:00.000Z
Cvss Score 8.6
Epss Score 0.20776
Previous Ids
Cvss Severity HIGH
Virtual Patch False
Cvss Estimated False
Epss Percentile 0.97416
Used In Malware unknown
Vulnerability Id CVE-2026-32255
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-09-18 11:00 UTC | Updated: 2026-09-18 11:00 UTC
Show details on NVD website
To clipboard 

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