CVE-2026-61511: vBulletin vBulletin

vBulletin < 6.2.2 Eval Injection RCE via vb5/template/runtime.php

CVSS 9.3 CriticalCriticalEPSS 0.056 · 92nd percentile

Critical, because:

CVSS score 9.3: 9.0 or more.

Published by the CVE Program (CNA: VulnCheck) at 27 Jul 2026, 12:39 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
vBulletin	vBulletin	affected 5.0.0 to 5.7.5, inclusive semver affected 6.0.0 to 6.2.1, inclusive semver unaffected 6.2.2 semver Other versions: affected

Identifiers

CVE-2026-61511

CNA

VulnCheck

Weakness (CWE)

CWE-95

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
9.3	Critical	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	CNA (VulnCheck)Used for this record
9.8	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.056, the 92nd percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

27 Jul 2026, 12:39 UTC Confirmed by the CVE List
27 Jul 2026, 14:16 UTC Confirmed by NVD

Sources

References from the CNA

forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4509358-security-patch-released-for-vbulletin-6-2-1-6-2-0-and-6-1-6
forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4509404-vbulletin-6-2-2-is-available
www.vulncheck.com/advisories/vbulletin-eval-injection-rce-via-vb5-template-runtime-php third-party-advisory
karmainsecurity.com/KIS-2026-13 technical-descriptionexploit
ssd-disclosure.com/vbulletin-runtime-template-runmaths-preauth-rce/ technical-descriptionexploit

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.