CVE-2026-121945: CoopCycle coopcycle-web

CoopCycle coopcycle-web before 6.20.1 IDOR via Incident Resource and Action Endpoint

CVSS 7.2 HighEPSS 0.0041 · 35th percentile

Published by the CVE Program (CNA: VulnCheck) at 4 Nov 2026, 12:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
CoopCycle	coopcycle-web pkg:github/coopcycle/coopcycle-web	affected before 6.20.1 semver Other versions: unaffected

Identifiers

CVE-2026-121945

CNA

VulnCheck

Weakness (CWE)

CWE-639

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.2	High	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N	CNA (VulnCheck)Used for this record
7.6	High	3.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0041, the 35th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

4 Nov 2026, 12:31 UTC Confirmed by the CVE List
4 Nov 2026, 12:39 UTC First seen by agentprime
4 Nov 2026, 13:17 UTC Confirmed by NVD

Sources

References from the CNA

github.com/coopcycle/coopcycle-web/issues/5390 issue-tracking
hackmd.io/@hieund/coopcycle-incident-courier-cross-tenant-bola third-party-advisory
github.com/coopcycle/coopcycle-web/commit/d997393d128afa1febe34e8f295b9511c12d19a0 patch
github.com/coopcycle/coopcycle-web/blob/v6.19.1/src/Entity/Incident/Incident.php#L43-L71 technical-description
www.vulncheck.com/advisories/coopcycle-coopcycle-web-before-6.20.1-idor-via-incident-resource-and-action-endpoint third-party-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.