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CVE-2026-110628 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:8.3 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

CNA: [email protected]CVSS-B:8.6 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/kanbn/kan	[email protected]	Vendor
https://github.com/kanbn/kan/blob/v0.6.0/apps/web/src/pages/api/download/attatchment.ts#L21-L52	[email protected]
https://github.com/kanbn/kan/blob/v0.6.0/.env.example#L25-L27	[email protected]
https://github.com/kanbn/kan/commit/53397d8e81dc1494d94132848c1f0416f1152bd7	[email protected]	Source CodeVendor
https://github.com/kanbn/kan/pull/590	[email protected]	Issue TrackingVendor
https://github.com/kanbn/kan/security/advisories/GHSA-qrx8-9hc6-jvqg	[email protected]	AdvisoryRemedyVendor
https://hackmd.io/@leediay/HyIxU63ofg	[email protected]	ExploitRemedyTechnical Analysis
https://www.vulncheck.com/advisories/kan-0.5.5-through-0.6.0-unauthenticated-ssrf-via-api-download-attatchment	[email protected]	AdvisoryBundleRemedy

see all 8 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-918	Server-Side Request Forgery (SSRF)	[email protected]

Affected Products

Product	Versions
Kan	>= 0.5.5, <= 0.6.0 (semver)
CPE No CPEs found in CPE dictionary for this product. Remediation Upgrade: v5.5.0moderate effort Workaround:low effort Block or restrict access to /api/download/attatchment at the reverse proxy level (nginx, Cloudflare, etc.).

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 16, 2026	CVE Modified	CISA-ADP
Oct 14, 2026	New CVE Received	[email protected]