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.).
CVE-2026-32255
HIGHPre-NVD 8.68.6Elevated
EchelonGraph scoreLOW confidence
This high-severity CVE scores 8.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: secondary
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 10%CVSS: 8.6Exploit: Elevated riskExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.6
- EG Score
- 8.6(low)
- EG Risk
- 43(Track)EG Risk 43/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity86% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 10%
- EPSS %ILE
- 95%
- KEV
- Not listed
Published
March 19, 2026
Last Modified
June 17, 2026
References (3)
- security-advisories@githubhttps://github.com/kanbn/kan/commit/53397d8e81dc1494d94132848c1f0416f1152bd7
- security-advisories@githubhttps://github.com/kanbn/kan/releases/tag/v0.5.5
- security-advisories@githubhttps://github.com/kanbn/kan/security/advisories/GHSA-qrx8-9hc6-jvqg
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 2× in last 7d / 2× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-27 14:38 UTCEG score recompute
- 2026-07-27 14:27 UTCOSV refresh
Related CVEs(same CWE)
Same CWE
10 shownCWE-918
- CVE-2016-10927EG 10.0CRITICAL
- CVE-2016-10926EG 10.0CRITICAL
- CVE-2018-10511EG 10.0CRITICAL
- CVE-2018-1000124EG 10.0CRITICAL
- CVE-2017-11291EG 10.0EPSS p92CRITICAL
- CVE-2017-12905EG 10.0CRITICAL
- CVE-2017-8794EG 10.0CRITICAL
- CVE-2017-13667EG 9.9CRITICAL
- CVE-2017-17674EG 9.8CRITICAL
- CVE-2013-4864EG 9.8EPSS p93CRITICAL
Frequently asked(5)
What is CVE-2026-32255?
CVE-2026-32255 is a high vulnerability published on March 19, 2026. 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…
When was CVE-2026-32255 disclosed?
CVE-2026-32255 was first published in the National Vulnerability Database on March 19, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-32255 actively exploited?
CVE-2026-32255 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 10% probability of exploitation in the next 30 days, which ranks it in the top 4.9% of all scored CVEs.
What is the CVSS score of CVE-2026-32255?
CVE-2026-32255 has a CVSS v3 base score of 8.6 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-32255?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-32255, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-32255
Is Your Infrastructure Affected by CVE-2026-32255?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.