CVE-2026-85532 Apache WSS4J: Insufficient Validation of Derived-Key Parameters
Attackers can cause excessive resource consumption or generate weak keys in Apache WSS4J by sending crafted WS-Security messages with invalid derived-key parameters.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85532?
CVE-2026-85532 is a high-severity denial of service vulnerability in Apache WSS4J, published on 30 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Apache WSS4J accepted attacker-controlled derived-key lengths and offsets without adequate bounds. This could permit cryptographically weak keys or excessive CPU and memory consumption when processing crafted WS-Security messages. The fixes enforce a minimum key length of 16 bytes, a maximum length of 512 bytes, and a maximum offset of 4096 bytes. Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.
Weakness: CWE-20
Which versions are affected by CVE-2026-85532?
It affects 1 product.
Products include Apache Wss4j.
How do I fix CVE-2026-85532?
No fix has been published for CVE-2026-85532 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-85532 being exploited?
There is no known exploitation of CVE-2026-85532 in the wild and no public exploit code.
Other vulnerabilities in Apache WSS4J
- CVE-2026-88920 Apache WSS4J: SAML Sender-Vouches Authentication Bypass
- CVE-2026-87830 Apache WSS4J: Streaming WS-SecurityPolicy validation may skip element-protection checks.
- CVE-2026-89238 Apache WSS4J: WSS4J EncryptedHeader child confusion causing wrong protected-header selection
- CVE-2026-92121 Apache WSS4J: WS-SecurityPolicy signature checks skipped in the streaming code after an STR-Transform reference
- CVE-2026-95616 Apache WSS4J: Unauthenticated denial of service via integer overflow in DER parsing of X.509 certificate extensions
Sources
Also known as DEBIAN-CVE-2026-85532, GHSA-5x6j-m6jc-q2r5, UBUNTU-CVE-2026-85532.