CVE-2026-121582: Umami

Affected products, as the CNA wrote them
Vendor	Product	Versions
Not given	Umami	affected 3.4.0 affected 3.4.1

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
6.9	Medium	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P	CNA (VulDB)Used for this record
6.5	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:C	CNA (VulDB)
6.5	Medium	3.0	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:C	CNA (VulDB)
6.4	Medium	2.0	AV:N/AC:L/Au:N/C:N/I:P/A:P/E:POC/RL:ND/RC:C	CNA (VulDB)

CISA KEV Not listed.
EPSS 0.0038, the 32nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

3 Nov 2026, 23:00 UTC Confirmed by the CVE List
3 Nov 2026, 23:13 UTC First seen by agentprime
3 Nov 2026, 23:17 UTC Confirmed by NVD

Sources

References from the CNA

vuldb.com/vuln/430425 vdb-entrytechnical-description
vuldb.com/vuln/430425/cti signaturepermissions-required
vuldb.com/cve/CVE-2026-121582 third-party-advisory
vuldb.com/submit/1019998 third-party-advisory
github.com/waterhunter2000-svg/vulnerability-reports related
github.com/umami-software/umami/security/advisories/GHSA-4cww-5p37-v8r2 broken-link
github.com/waterhunter2000-svg/vulnerability-reports/blob/main/02-umami-record-unauth-write.md exploit

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.