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CVE-2026-110628— Kan 0.5.5 through 0.6.0 Unauthenticated SSRF via /api/download/attatchment

Quick assessment

Affected
kanbn kan
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 fe

CVSS 8.6 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
kanbn kan 0.5.5≤ 0.6.0 affected
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I. Basic Information for CVE-2026-110628

Vulnerability Information

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Vulnerability Title
Kan 0.5.5 through 0.6.0 Unauthenticated SSRF via /api/download/attatchment
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
kanbn kan 0.5.5 ~ 0.6.0 -

II. Public POCs for CVE-2026-110628

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III. Intelligence Information for CVE-2026-110628

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Patches & Fixes for CVE-2026-110628 (2)

Vendor Advisories for CVE-2026-110628 (1)

Other References for CVE-2026-110628 (4)

IV. Related Vulnerabilities

Same product: kan
Same vendor: kanbn
Same weakness: CWE-918

V. Comments for CVE-2026-110628

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