CVE-2021-26691

Published on: 06/10/2021 12:00:00 AM UTC

Last Modified on: 06/10/2021 03:15:00 PM UTC

Certain versions of Apache HTTP Server from Apache Software Foundation contain the following vulnerability:

In Apache HTTP Server versions 2.4.0 to 2.4.46 a specially crafted SessionHeader sent by an origin server could cause a heap overflow

CVE References

Description Tags Link
Pony Mail! lists.apache.org
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URL Logo MLIST [httpd-dev] 20210610 Re: svn commit: r1890598 - in /httpd/site/trunk/content/security/json: CVE-2019-17567.json CVE-2020-13938.json CVE-2020-13950.json CVE-2020-35452.json CVE-2021-26690.json CVE-2021-26691.json CVE-2021-30641.json CVE-2021-31618.json
httpd 2.4 vulnerabilities - The Apache HTTP Server Project httpd.apache.org
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URL Logo MISC httpd.apache.org/security/vulnerabilities_24.html
Pony Mail! lists.apache.org
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URL Logo MISC lists.apache.org/thread.html/re026d3da9d7824bd93b9f871c0fdda978d960c7e62d8c43cba8d0bf3%40%3Ccvs.httpd.apache.org%3E
oss-security - CVE-2021-26691: Apache httpd: mod_session response handling heap overflow www.openwall.com
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URL Logo MLIST [oss-security] 20210609 CVE-2021-26691: Apache httpd: mod_session response handling heap overflow
Pony Mail! lists.apache.org
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URL Logo MLIST [httpd-announce] 20210609 CVE-2021-26691: mod_session response handling heap overflow

Related QID Numbers

  • 730109 Apache HTTP Server Multiple Vulnerabilities

Known Affected Software

Vendor Product Version
Apache Software Foundation Apache_HTTP_Server= 2.4.46
Apache Software Foundation Apache_HTTP_Server= 2.4.43
Apache Software Foundation Apache_HTTP_Server= 2.4.41
Apache Software Foundation Apache_HTTP_Server= 2.4.39
Apache Software Foundation Apache_HTTP_Server= 2.4.38
Apache Software Foundation Apache_HTTP_Server= 2.4.37
Apache Software Foundation Apache_HTTP_Server= 2.4.35
Apache Software Foundation Apache_HTTP_Server= 2.4.34
Apache Software Foundation Apache_HTTP_Server= 2.4.33
Apache Software Foundation Apache_HTTP_Server= 2.4.29
Apache Software Foundation Apache_HTTP_Server= 2.4.28
Apache Software Foundation Apache_HTTP_Server= 2.4.27
Apache Software Foundation Apache_HTTP_Server= 2.4.26
Apache Software Foundation Apache_HTTP_Server= 2.4.25
Apache Software Foundation Apache_HTTP_Server= 2.4.23
Apache Software Foundation Apache_HTTP_Server= 2.4.20
Apache Software Foundation Apache_HTTP_Server= 2.4.18
Apache Software Foundation Apache_HTTP_Server= 2.4.17
Apache Software Foundation Apache_HTTP_Server= 2.4.16
Apache Software Foundation Apache_HTTP_Server= 2.4.12
Apache Software Foundation Apache_HTTP_Server= 2.4.10
Apache Software Foundation Apache_HTTP_Server= 2.4.9
Apache Software Foundation Apache_HTTP_Server= 2.4.7
Apache Software Foundation Apache_HTTP_Server= 2.4.6
Apache Software Foundation Apache_HTTP_Server= 2.4.4
Apache Software Foundation Apache_HTTP_Server= 2.4.3
Apache Software Foundation Apache_HTTP_Server= 2.4.2
Apache Software Foundation Apache_HTTP_Server= 2.4.1
Apache Software Foundation Apache_HTTP_Server= 2.4.0

Discovery Credit

Discovered internally Christophe Jaillet

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-26691 : In #Apache HTTP Server versions 2.4.0 to 2.4.46 a specially crafted SessionHeader sent by an origi… twitter.com/i/web/status/1… 2021-06-10 07:14:22
Twitter Icon @ottoto2017 #Apache #httpd をupdate し、2.4.48 ではCVE-2021-31618、2.4.47では、CVE-2021-30641,CVE-2020-35452,CVE-2021-26691,CVE-2021-266… twitter.com/i/web/status/1… 2021-06-10 09:23:09
Reddit Logo Icon /r/netcve CVE-2021-26691 2021-06-10 07:41:51
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