Deserialization in Apereo Foundation Openequella
CVE-2026-67615
openEQUELLA before 2026.1.0 contains an authenticated remote code execution vulnerability that allows any authenticated non-guest user to execute arbitrary code by exploiting Java deserialization in the HTTP invoker endpoint at /invoker/*. Attackers can bypass the class-name denylist enforced by PluginAwareObjectInputStream by nesting a serialized payload inside a java.security.SignedObject, causing the inner stream to be deserialized by a separate ObjectInputStream that does not apply the denylist, ultimately reaching a JNDI sink and enabling code execution.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (45.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/openequella/openEQUELLA/releases/tag/2026.1.0 (release-notes, patch)
- www.vulncheck.com/advisories/openequella-authenticated-rce-via-java-deserializa… (third-party-advisory)
- blog.evan.lat/posts/openeq (technical-description, exploit)
- github.com/openequella/openEQUELLA/security/advisories/GHSA-97gw-jwjx-fx9h (vendor-advisory)
Frequently asked questions
- What is CVE-2026-67615?
- CVE-2026-67615 is a high-severity vulnerability in Apereo Foundation Openequella, classified under Incomplete List of Disallowed Inputs. CVSS score: 8.8/10. Published 2026-09-22.
- How severe is CVE-2026-67615?
- High severity. CVSS v3 base score is 8.8 out of 10.