CVE-2026-87830

critical · 9.1

In the StAX streaming WS-SecurityPolicy validator, certain relative or unsupported XPath expressions can be converted into paths that never match the actual XML element path. A remote SOAP peer may therefore send a required element without the expected signature or encryption. Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.

9.1

CVSS

0.3%

EPSS (exploit prob.)

19th

EPSS percentile

2026-09-30

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weaknesses

CWE-917

References

https://lists.apache.org/thread.html/lwlozb1x20d16f9dnyvoygc9rrhzq2vn
http://www.openwall.com/lists/oss-security/2026/09/30/9

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-87830