IBM HTTP Server 8.5/9.0 mod_fastcgi assertion

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability was found in IBM HTTP Server 8.5/9.0. It has been rated as problematic. This impacts an unknown function of the component mod_fastcgi. Performing a manipulation results in assertion. This vulnerability is known as CVE-2026-8852. Attacking locally is a requirement. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in IBM HTTP Server 8.5/9.0. This affects an unknown function of the component mod_fastcgi. The manipulation with an unknown input leads to a assertion vulnerability. CWE is classifying the issue as CWE-617. The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary. This is going to have an impact on availability. The summary by CVE is:

IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service via the optional module mod_fastcgi module.

It is possible to read the advisory at ibm.com. This vulnerability is uniquely identified as CVE-2026-8852 since 05/18/2026. The exploitability is told to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-31896). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.2
CNA Vector (ibm): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Assertion
CWE: CWE-617
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

05/18/2026 CVE reserved
05/26/2026 +8 days Advisory disclosed
05/26/2026 +0 days VulDB entry created
05/26/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: ibm.com

Advisory: ibm.com
Status: Confirmed

CVE: CVE-2026-8852 (🔒)
GCVE (CVE): GCVE-0-2026-8852
GCVE (VulDB): GCVE-100-365715
EUVD: 🔒

Entryinfo

Created: 05/26/2026 19:42
Updated: 05/26/2026 20:25
Changes: 05/26/2026 19:42 (64), 05/26/2026 20:25 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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