🛡️ CVE-2026-11536 — websphere-application-server

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs low-level privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
• Privileges required: Low — an ordinary user account is enough.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Changed — a successful attack reaches components beyond the vulnerable one.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: High — total loss, or loss the attacker controls.
• Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2026-11536 is classified as CWE-502: Deserialization of Untrusted Data. Serialised data from an untrusted source is reconstructed into objects, which can trigger code during the process.

Affected software

CVE-2026-11536 is recorded against 1 package.

• websphere-application-server (from 9.0.0.0 up to 9.0.5.28)

Timeline and source

Published on 30 July 2026 and last revised on 5 August 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

www.ibm.com

Other advisories for this package

websphere-application-server has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2026-8400 (8.1 High, published 5 Aug 2026)
• CVE-2026-10842 (7.5 High, published 30 Jul 2026)
• CVE-2026-11897 (7.5 High, published 30 Jul 2026)
• CVE-2026-11383 (5.4 Medium, published 30 Jul 2026)
• CVE-2026-14980 (8.3 High, published 30 Jul 2026)
• CVE-2026-9322 (7.5 High, published 30 Jul 2026)
• CVE-2026-11707 (9.3 Critical, published 30 Jul 2026)
• CVE-2026-2482 (3.1 Low, published 29 Jul 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-502: Deserialization of Untrusted Data) in other software:

• CVE-2026-59940 (9.8 Critical, published 18 Aug 2026)
• CVE-2026-47058 (8.0 High, published 17 Aug 2026)

Details

Affected Packages

References