CVE-2026-49975: CWE-789 Memory Allocation with Excessive Size Value in Apache Software Foundation Apache HTTP Server
Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2026-49975 involves memory allocation with an excessive size value in the Apache HTTP Server's mod_http2 module. This flaw can be exploited remotely by sending malicious HTTP/2 requests that cause the server to allocate excessive memory, leading to a denial of service condition. The affected versions span from 2.4.17 through 2.4.67. Red Hat's advisories confirm this issue and provide updates in their JBoss Core Services Apache HTTP Server 2.4.62 Service Pack 4 release that mitigate this vulnerability along with other related security issues.
Potential Impact
Successful exploitation of this vulnerability results in denial of service by exhausting server memory resources, causing the Apache HTTP Server to become unresponsive or crash. There is no indication of confidentiality or integrity impact. The vulnerability is remotely exploitable without authentication or user interaction.
Mitigation Recommendations
Red Hat has released security updates in JBoss Core Services Apache HTTP Server 2.4.62 Service Pack 4 that address CVE-2026-49975. Applying these official patches will remediate the vulnerability. Users should ensure all relevant Red Hat errata and updates are applied. Patch status is confirmed by vendor advisories. No additional mitigation steps are specified beyond applying the official updates.
CVE-2026-49975: CWE-789 Memory Allocation with Excessive Size Value in Apache Software Foundation Apache HTTP Server
Description
Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.
CVSS v3.1
Score 7.5high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-49975 involves memory allocation with an excessive size value in the Apache HTTP Server's mod_http2 module. This flaw can be exploited remotely by sending malicious HTTP/2 requests that cause the server to allocate excessive memory, leading to a denial of service condition. The affected versions span from 2.4.17 through 2.4.67. Red Hat's advisories confirm this issue and provide updates in their JBoss Core Services Apache HTTP Server 2.4.62 Service Pack 4 release that mitigate this vulnerability along with other related security issues.
Potential Impact
Successful exploitation of this vulnerability results in denial of service by exhausting server memory resources, causing the Apache HTTP Server to become unresponsive or crash. There is no indication of confidentiality or integrity impact. The vulnerability is remotely exploitable without authentication or user interaction.
Mitigation Recommendations
Red Hat has released security updates in JBoss Core Services Apache HTTP Server 2.4.62 Service Pack 4 that address CVE-2026-49975. Applying these official patches will remediate the vulnerability. Users should ensure all relevant Red Hat errata and updates are applied. Patch status is confirmed by vendor advisories. No additional mitigation steps are specified beyond applying the official updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-02T17:20:37.983Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-49975","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:27200","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:25225","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:25090","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:25057","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:25042","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:27201","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:27114","vendor":"Red Hat"}]
Threat ID: 6a26e46de29bf47b501e5328
Added to database: 06/08/2026, 15:49:01 UTC
Last enriched: 07/17/2026, 09:00:10 UTC
Last updated: 07/31/2026, 19:24:46 UTC
Views: 126
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