CVE-2026-95616

high

An integer overflow in WSS4J's DER bounds check lets an oversized allocation pass validation.

Vendor / product: Apache — wss4j

An integer overflow in WSS4J's DER bounds check lets an oversized allocation pass validation. An unauthenticated attacker can send a SOAP message carrying an X.509 certificate whose SubjectKeyIdentifier extension declares a length of 0x7FFFFFFF; WSS4J decodes this while resolving the signature's key reference, before the message is authenticated, so an eleven-byte extension triggers a 2 GB allocation. Repeated requests exhaust server memory. Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.

CVSS

7.5

7.5 (CVSS v3.1)

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

Severity source: NVD CVSS v3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)

Timeline (UTC)

Published: 2026-09-30 13:17

Modified: 2026-10-06 17:21

NVD status: Analyzed

Last synced 2 days ago

Verified against the source API 2026-10-27 06:56 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

apache / wss4j <2.4.4, ≥3.0.0 <3.0.6, ≥4.0.0 <4.0.2

Weakness classification (CWE)

CWE-190

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Vendor advisory: https://lists.apache.org/thread.html/sdf0fsphkg4qbj7nh2brjgwvcmd67hct

References

https://lists.apache.org/thread.html/sdf0fsphkg4qbj7nh2brjgwvcmd67hct security@apache.org
http://www.openwall.com/lists/oss-security/2026/09/30/14 af854a3a-2127-422b-91ae-364da2661108

Data sources

NVD CVE API 2.0 — fetched 2026-10-27 06:56 UTC · record ↗

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CVE-2026-95616

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