Vulnerability-Lookup

rlsa-2026:25090

Vulnerability from osv_rocky

Published

2026-06-11 00:01

Modified

2026-06-25 00:05

Summary

Important: httpd:2.4 security update

Details

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

Security Fix(es):

httpd: HTTP/2: Remote Denial of Service via compression bomb and Slowloris-style attack (CVE-2026-49975)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Severity

7.5 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Credits

Rocky Enterprise Software Foundation

Red Hat

References

URL

Type

	https://errata.rockylinux.org/RLSA-2026:25090	ADVISORY
	https://bugzilla.redhat.com/show_bug.cgi?id=2485371	REPORT

JSON

To clipboard

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  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "details": "The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.\n\nSecurity Fix(es):\n\n* httpd: HTTP/2: Remote Denial of Service via compression bomb and Slowloris-style attack (CVE-2026-49975)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
  "id": "RLSA-2026:25090",
  "modified": "2026-06-25T00:05:54.122118Z",
  "published": "2026-06-11T00:01:12.992766Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:25090"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2485371"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
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      "type": "CVSS_V3"
    }
  ],
  "summary": "Important: httpd:2.4 security update",
  "upstream": [
    "CVE-2026-49975"
  ]
}

CVE-2026-49975 (GCVE-0-2026-49975)

Vulnerability from cvelistv5 – Published: 2026-06-08 15:26 – Updated: 2026-08-05 12:14

Title

Apache HTTP Server: mod_http2 denial of service

Summary

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.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-789 - Memory Allocation with Excessive Size Value
CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)

Assigner

apache

References

20 references

URL	Tags
https://httpd.apache.org/security/vulnerabilities…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/06/03/3
https://lists.debian.org/debian-lts-announce/2026…
http://www.openwall.com/lists/oss-security/2026/0…
https://github.com/EQSTLab/CVE-2026-49975	exploit
https://access.redhat.com/security/cve/CVE-2026-49975	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2485371	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:27200	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:50538	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25225	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25090	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36846	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36831	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36373	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:50572	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25057	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25042	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:27201	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:27114	vendor-advisoryx_refsource_REDHAT

Impacted products

21 products

Vendor	Product	Version
Apache Software Foundation	Apache HTTP Server	Affected: 2.4.17 , ≤ 2.4.67 (semver)
Red Hat	JBoss Core Services for RHEL 8	Unaffected: 0:2.4.62-13.el8jbcs , < * (rpm) cpe:/a:redhat:jboss_core_services:1::el8
Red Hat	JBoss Core Services for RHEL 8	Unaffected: 0:2.0.29-10.el8jbcs , < * (rpm) cpe:/a:redhat:jboss_core_services:1::el8
Red Hat	JBoss Core Services on RHEL 7	Unaffected: 0:2.4.62-13.el7jbcs , < * (rpm) cpe:/a:redhat:jboss_core_services:1::el7
Red Hat	JBoss Core Services on RHEL 7	Unaffected: 0:2.0.29-10.el7jbcs , < * (rpm) cpe:/a:redhat:jboss_core_services:1::el7
Red Hat	Red Hat Enterprise Linux 10	Unaffected: 0:2.0.29-4.el10_2.1 , < * (rpm) cpe:/o:redhat:enterprise_linux:10.2
Red Hat	Red Hat Enterprise Linux 10.0 Extended Update Support	Unaffected: 0:2.0.29-2.el10_0.2 , < * (rpm) cpe:/o:redhat:enterprise_linux_eus:10.0
Red Hat	Red Hat Enterprise Linux 8	Unaffected: 8100020260608081321.489197e6 , < * (rpm) cpe:/a:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	Unaffected: 8040020260702193120.522a0ee4 , < * (rpm) cpe:/a:redhat:rhel_aus:8.4
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	Unaffected: 8040020260702193120.522a0ee4 , < * (rpm) cpe:/a:redhat:rhel_eus_long_life:8.4
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	Unaffected: 8060020260702195216.ad008a3a , < * (rpm) cpe:/a:redhat:rhel_aus:8.6
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	Unaffected: 8060020260702195216.ad008a3a , < * (rpm) cpe:/a:redhat:rhel_eus_long_life:8.6
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service	Unaffected: 8080020260702200145.63b34585 , < * (rpm) cpe:/a:redhat:rhel_tus:8.8
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions	Unaffected: 8080020260702200145.63b34585 , < * (rpm) cpe:/a:redhat:rhel_e4s:8.8
Red Hat	Red Hat Enterprise Linux 9	Unaffected: 0:2.0.26-6.el9_8.1 , < * (rpm) cpe:/a:redhat:enterprise_linux:9
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support	Unaffected: 0:2.0.26-4.el9_6.2 , < * (rpm) cpe:/a:redhat:rhel_eus:9.6
Red Hat	Red Hat JBoss Core Services 2.4.62.SP4	Unaffected: httpd24-httpd , < * (rpm) Unaffected: httpd24-mod_http2 , < * (rpm) cpe:/a:redhat:jboss_core_services:1
Red Hat	Red Hat Hardened Images	Unaffected: 2.4.68-1.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat OpenShift Service Mesh 2.6	Unaffected: 1781604724 , < * (rpm) cpe:/a:redhat:service_mesh:2.6::el9
Red Hat	Red Hat JBoss Core Services	cpe:/a:redhat:jboss_core_services:1
Red Hat	Red Hat JBoss Web Server 5	cpe:/a:redhat:jboss_enterprise_web_server:5

Credits

Quang Luong of Calif.IO in collaboration with OpenAI Codex

Show details on NVD website

JSON

To clipboard

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    ],
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        {
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          "product": "Apache HTTP Server",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
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              "status": "affected",
              "version": "2.4.17",
              "versionType": "semver"
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      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Quang Luong of Calif.IO in collaboration with OpenAI Codex"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eMemory Allocation with Excessive Size Value vulnerability in Apache HTTP Server\u0027s mod_http leads to denial of service via malicious HTTP requests.\u003c/p\u003e\u003cp\u003eThis issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.\u003c/p\u003e\u003cp\u003e\u003cbr\u003e\u003c/p\u003e"
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      "problemTypes": [
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            {
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      "providerMetadata": {
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      "references": [
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          "tags": [
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          "url": "https://httpd.apache.org/security/vulnerabilities_24.html"
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      "source": {
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      },
      "timeline": [
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          "time": "2026-05-26T12:00:00.000Z",
          "value": "reported"
        },
        {
          "lang": "en",
          "time": "2026-05-27T12:00:00.000Z",
          "value": "fixed upstream in mod_h2 https://github.com/icing/mod_h2/commit/35c6e405390ed361189a82acd96675401ea5947c"
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        {
          "lang": "en",
          "time": "2026-06-02T12:00:00.000Z",
          "value": "fixed in 2.4.x by r1934882"
        },
        {
          "lang": "eng",
          "time": "2026-06-08T12:00:00.000Z",
          "value": "2.4.68 released"
        }
      ],
      "title": "Apache HTTP Server: mod_http2 denial of service",
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      }
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  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2026-49975",
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    "dateReserved": "2026-06-02T17:20:37.983Z",
    "dateUpdated": "2026-08-05T12:14:49.327Z",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

rlsa-2026:25090

Vulnerability from osv_rocky

CVE-2026-49975 (GCVE-0-2026-49975)

Tags

Sightings

Nomenclature