CVE-2026-8852: CWE-617 Reachable Assertion in IBM HTTP Server
IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service via the optional module mod_fastcgi module.
AI Analysis
Technical Summary
IBM HTTP Server versions 8.5.0 and 9.0 contain a reachable assertion vulnerability (CWE-617) in the optional mod_fastcgi module. This flaw can be triggered to cause a denial of service, impacting availability. The CVSS 3.1 base score is 6.2 (medium severity) with an attack vector of local (AV:L), low attack complexity, no privileges required, and no user interaction needed. The vulnerability does not affect confidentiality or integrity. No vendor advisory or patch information is currently available.
Potential Impact
The vulnerability allows an attacker with local access to cause a denial of service on affected IBM HTTP Server instances by triggering a reachable assertion in the mod_fastcgi module. This results in service disruption but does not compromise data confidentiality or integrity. There are no known exploits in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider disabling the mod_fastcgi module if it is not required to reduce exposure. Monitor IBM's security advisories for updates.
CVE-2026-8852: CWE-617 Reachable Assertion in IBM HTTP Server
Description
IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service via the optional module mod_fastcgi module.
CVSS v3.1
Score 6.2medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
IBM HTTP Server versions 8.5.0 and 9.0 contain a reachable assertion vulnerability (CWE-617) in the optional mod_fastcgi module. This flaw can be triggered to cause a denial of service, impacting availability. The CVSS 3.1 base score is 6.2 (medium severity) with an attack vector of local (AV:L), low attack complexity, no privileges required, and no user interaction needed. The vulnerability does not affect confidentiality or integrity. No vendor advisory or patch information is currently available.
Potential Impact
The vulnerability allows an attacker with local access to cause a denial of service on affected IBM HTTP Server instances by triggering a reachable assertion in the mod_fastcgi module. This results in service disruption but does not compromise data confidentiality or integrity. There are no known exploits in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider disabling the mod_fastcgi module if it is not required to reduce exposure. Monitor IBM's security advisories for updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-05-18T16:13:22.116Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a15d235891d628fdc604deb
Added to database: 5/26/2026, 5:02:45 PM
Last enriched: 5/26/2026, 5:18:27 PM
Last updated: 5/26/2026, 7:56:58 PM
Views: 7
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