Red Hat Security Advisory: mod_http2 security update
A security vulnerability (CVE-2026-49975) affecting the mod_http2 Apache httpd module in Red Hat Enterprise Linux 9 allows remote denial of service via a compression bomb and Slowloris-style attack. The vulnerability impacts HTTP/2 protocol handling on httpd 2. 4 servers. Red Hat has released an important security update to address this issue in mod_http2 version 2. 0. 26-6. el9_8. 1. The update mitigates the risk of remote denial of service attacks exploiting this flaw.
AI Analysis
Technical Summary
The mod_http2 module for Apache httpd 2.4, which implements the HTTP/2 protocol using libnghttp2, contains a vulnerability (CVE-2026-49975) that allows remote attackers to cause a denial of service via specially crafted HTTP/2 requests involving compression bombs and Slowloris-style techniques. This can exhaust server resources and disrupt service availability. Red Hat has issued an important security advisory (RHSA-2026:25057) and released updated packages for Red Hat Enterprise Linux 9 to fix this issue.
Potential Impact
Successful exploitation of this vulnerability can cause a remote denial of service condition on affected servers running mod_http2, potentially leading to service disruption. There is no indication of code execution or data breach from the provided information. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated mod_http2 packages (version 2.0.26-6.el9_8.1) for Red Hat Enterprise Linux 9 that fix this vulnerability. Users should apply these official updates promptly following Red Hat's guidance at https://access.redhat.com/articles/11258. This update mitigates the risk of remote denial of service attacks exploiting this vulnerability.
Red Hat Security Advisory: mod_http2 security update
Description
A security vulnerability (CVE-2026-49975) affecting the mod_http2 Apache httpd module in Red Hat Enterprise Linux 9 allows remote denial of service via a compression bomb and Slowloris-style attack. The vulnerability impacts HTTP/2 protocol handling on httpd 2. 4 servers. Red Hat has released an important security update to address this issue in mod_http2 version 2. 0. 26-6. el9_8. 1. The update mitigates the risk of remote denial of service attacks exploiting this flaw.
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The mod_http2 module for Apache httpd 2.4, which implements the HTTP/2 protocol using libnghttp2, contains a vulnerability (CVE-2026-49975) that allows remote attackers to cause a denial of service via specially crafted HTTP/2 requests involving compression bombs and Slowloris-style techniques. This can exhaust server resources and disrupt service availability. Red Hat has issued an important security advisory (RHSA-2026:25057) and released updated packages for Red Hat Enterprise Linux 9 to fix this issue.
Potential Impact
Successful exploitation of this vulnerability can cause a remote denial of service condition on affected servers running mod_http2, potentially leading to service disruption. There is no indication of code execution or data breach from the provided information. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated mod_http2 packages (version 2.0.26-6.el9_8.1) for Red Hat Enterprise Linux 9 that fix this vulnerability. Users should apply these official updates promptly following Red Hat's guidance at https://access.redhat.com/articles/11258. This update mitigates the risk of remote denial of service attacks exploiting this vulnerability.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:25057
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a29eed23187570649a053e5
Added to database: 6/10/2026, 11:10:10 PM
Last enriched: 6/10/2026, 11:10:54 PM
Last updated: 6/11/2026, 1:27:27 AM
Views: 6
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