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rlsa-2026:42828
Vulnerability from osv_rocky
Published
2026-07-21 18:01
Modified
2026-07-24 00:08
Summary
Important: httpd:2.4 security, bug fix, and enhancement update
Details
The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.
Security Fix(es):
-
httpd: incomplete fix for CVE-2023-38709 (CVE-2024-42516)
-
httpd: NULL pointer dereference via specially crafted request (CVE-2026-29169)
-
httpd: Apache HTTP Server: Heap-based Buffer Overflow via malicious backend servers (CVE-2026-34356)
-
httpd: Apache HTTP Server: Buffer Over-read via outbound OCSP requests to attacker-controlled server (CVE-2026-44185)
-
httpd: Apache HTTP Server: Denial of Service via crafted regular expressions (CVE-2026-44631)
-
httpd: Apache HTTP Server: Denial of Service in mod_proxy_ftp via attacker-controlled FTP server (CVE-2026-44186)
-
httpd: Apache HTTP Server: Heap-based Buffer Overflow via untrusted content in mod_xml2enc (CVE-2026-42536)
-
httpd: Apache HTTP Server: Buffer overflow in mod_proxy_html allows security bypass (CVE-2026-34355)
-
httpd: Apache HTTP Server: Out-of-bounds Read in mod_headers and mod_mime (CVE-2026-43951)
Bug Fix(es) and Enhancement(s):
- mod_proxy_html regression in CVE-2026-34355 fix [rhel-8.10.z] (JIRA:Rocky Linux-192751)
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
7.7 (High)
Credits
Rocky Enterprise Software Foundation
Red Hat
References
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"modified": "2026-07-24T00:08:22.159290Z",
"published": "2026-07-21T18:01:06.762101Z",
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CVE-2024-42516 (GCVE-0-2024-42516)
Vulnerability from cvelistv5 – Published: 2025-07-10 16:53 – Updated: 2025-11-04 21:08
VLAI
EPSS
VEX
Title
Apache HTTP Server: HTTP response splitting
Summary
HTTP response splitting in the core of Apache HTTP Server allows an attacker who can manipulate the Content-Type response headers of applications hosted or proxied by the server can split the HTTP response.
This vulnerability was described as CVE-2023-38709 but the patch included in Apache HTTP Server 2.4.59 did not address the issue.
Users are recommended to upgrade to version 2.4.64, which fixes this issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-20 - Improper Input Validation
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
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(semver)
|
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CVE-2026-29169 (GCVE-0-2026-29169)
Vulnerability from cvelistv5 – Published: 2026-05-04 14:48 – Updated: 2026-05-05 20:23
VLAI
EPSS
VEX
Title
Apache HTTP Server: mod_dav_lock indirect lock crash
Summary
A NULL pointer dereference in mod_dav_lock in Apache HTTP Server 2.4.66 and earlier may allow an attacker to crash the server with a malicious request.mod_dav_lock is not used internally by mod_dav or mod_dav_fs.
The only known use-case for mod_dav_lock was mod_dav_svn from Apache Subversion earlier than version 1.2.0.
Users are recommended to upgrade to version 2.4.66, which fixes this issue, or remove mod_dav_lock.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
0 , ≤ 2.4.66
(semver)
|
Credits
Pavel Kohout, Aisle Research, Aisle.com
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CVE-2026-34355 (GCVE-0-2026-34355)
Vulnerability from cvelistv5 – Published: 2026-06-08 15:20 – Updated: 2026-07-22 12:08
VLAI
EPSS
VEX
Title
Apache HTTP Server: mod_proxy_html buffer overflow
Summary
A buffer overflow in mod_proxy_html in Apache HTTP Server 2.4.67 and earlier allows an attack by an untrusted backend.
Users are recommended to upgrade to version 2.4.68, which fixes this issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://httpd.apache.org/security/vulnerabilities… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/06/08/6 | |
| https://access.redhat.com/security/cve/CVE-2026-34355 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2486414 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:34109 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:42828 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:41906 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:25042 | vendor-advisoryx_refsource_REDHAT |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
2.4.0 , ≤ 2.4.67
(semver)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:2.4.63-13.el10_2.4 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
8100020260714175253.489197e6 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:2.4.62-13.el9_8.5 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Hardened Images |
Unaffected:
2.4.68-1.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6 |
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7 |
Credits
Elhanan Haenel
Junhui Lee
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CVE-2026-34356 (GCVE-0-2026-34356)
Vulnerability from cvelistv5 – Published: 2026-06-08 15:12 – Updated: 2026-06-08 22:32
VLAI
EPSS
VEX
Title
Apache HTTP Server: ProxyPassReverseCookieMap buffer overflow
Summary
Heap-based Buffer Overflow vulnerability in Apache HTTP Server with malicious backend servers and ProxyPassReverseCookie*
This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.
Users are recommended to upgrade to version 2.4.68, which fixes the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
2.4.0 , ≤ 2.4.67
(semver)
|
Credits
Arkadi Vainbrand
depthfirst (depthfirst.com)
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CVE-2026-42536 (GCVE-0-2026-42536)
Vulnerability from cvelistv5 – Published: 2026-06-08 15:23 – Updated: 2026-07-22 12:08
VLAI
EPSS
VEX
Title
Apache HTTP Server: mod_xml2enc heap overflow
Summary
Heap-based Buffer Overflow vulnerability in Apache HTTP Server with mod_xml2enc, xml2StartParse, and untrusted content
This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.
Users are recommended to upgrade to version 2.4.68, which fixes the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://httpd.apache.org/security/vulnerabilities… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/06/08/9 | |
| https://access.redhat.com/security/cve/CVE-2026-42536 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2486411 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:34109 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:42828 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:41906 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:25042 | vendor-advisoryx_refsource_REDHAT |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
2.4.0 , ≤ 2.4.67
(semver)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:2.4.63-13.el10_2.4 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
8100020260714175253.489197e6 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:2.4.62-13.el9_8.5 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Hardened Images |
Unaffected:
2.4.68-1.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6 |
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7 |
Credits
Zhenpeng (Leo) Lin at depthfirst
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CVE-2026-43951 (GCVE-0-2026-43951)
Vulnerability from cvelistv5 – Published: 2026-06-08 15:16 – Updated: 2026-06-08 22:32
VLAI
EPSS
VEX
Title
Apache HTTP Server: OOB Read in `merge_response_headers` can cause crash
Summary
Out-of-bounds Read vulnerability in Apache HTTP Server with mod_headers and mod_mime and multiple response languages.
This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://httpd.apache.org/security/vulnerabilities… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
2.4.0 , ≤ 2.4.67
(semver)
|
Credits
Zhenpeng (Leo) Lin at depthfirst
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CVE-2026-44185 (GCVE-0-2026-44185)
Vulnerability from cvelistv5 – Published: 2026-06-08 15:22 – Updated: 2026-07-22 12:08
VLAI
EPSS
VEX
Title
Apache HTTP Server: Stack Buffer Over-Read in mod_ssl OCSP `send_request`
Summary
Buffer Over-read vulnerability in Apache HTTP Server via outbound OCSP requests to an attacker controlled OCSP server
This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.
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Severity
7.3 (High)
SSVC
Exploitation: none
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Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://httpd.apache.org/security/vulnerabilities… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… | |
| https://access.redhat.com/security/cve/CVE-2026-44185 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2486397 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:34109 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:42828 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:41906 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:25042 | vendor-advisoryx_refsource_REDHAT |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
2.4.0 , ≤ 2.4.67
(semver)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:2.4.63-13.el10_2.4 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
8100020260714175253.489197e6 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:2.4.62-13.el9_8.5 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Hardened Images |
Unaffected:
2.4.68-1.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6 |
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7 |
Credits
Zhenpeng (Leo) Lin at depthfirst
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CVE-2026-44186 (GCVE-0-2026-44186)
Vulnerability from cvelistv5 – Published: 2026-06-08 15:11 – Updated: 2026-06-09 12:20
VLAI
EPSS
VEX
Title
Apache HTTP Server: Loop in `proxy_ftp_handler` in mod_proxy_ftp
Summary
Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in the mod_proxy_ftp module in Apache HTTP Server with an attacker controlled backend FTP server.
This issue affects undefined: from 2.4.0 through 2.4.67.
Users are recommended to upgrade to version 2.4.68, which fixes the issue.
Severity
7.3 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://httpd.apache.org/security/vulnerabilities… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
2.4.0 , ≤ 2.4.67
(semver)
|
Credits
Zhenpeng (Leo) Lin at depthfirst
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CVE-2026-44631 (GCVE-0-2026-44631)
Vulnerability from cvelistv5 – Published: 2026-06-08 15:19 – Updated: 2026-06-08 22:32
VLAI
EPSS
VEX
Title
Apache HTTP Server: Heap Underflow in `ap_regname` via Signed Char Overflow
Summary
Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration.
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Severity
9.8 (Critical)
SSVC
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Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-124 - Buffer Underwrite
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://httpd.apache.org/security/vulnerabilities… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
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|
Credits
Zhenpeng (Leo) Lin at depthfirst
Bartlomiej Dmitruk
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"value": "\u003cp\u003eBuffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration.\u003c/p\u003e\u003cp\u003eThis issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.\u003c/p\u003e\u003cp\u003eUsers are recommended to upgrade to version 2.4.68, which fixes the issue.\u003c/p\u003e"
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"time": "2026-04-27T12:00:00.000Z",
"value": "reported"
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{
"lang": "en",
"time": "2026-06-05T12:00:00.000Z",
"value": "fixed in 2.4.x by r1935015"
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"lang": "eng",
"time": "2026-06-08T12:00:00.000Z",
"value": "2.4.68 released"
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"title": "Apache HTTP Server: Heap Underflow in `ap_regname` via Signed Char Overflow",
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"datePublished": "2026-06-08T15:19:23.570Z",
"dateReserved": "2026-05-07T12:39:02.065Z",
"dateUpdated": "2026-06-08T22:32:33.325Z",
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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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.
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