CVE-2022-23943

CRITICALNVD 9.89.8—Elevated

9.8

Out-of-bounds Write vulnerability in mod_sed of Apache HTTP Server allows an attacker to overwrite heap memory with possibly attacker provided data. This issue affects Apache HTTP Server 2.4 version 2.4.52 and prior versions.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 98.3%
KEV: Not listed

Published

March 14, 2022

Last Modified

May 1, 2025

Advisory Details (9)

Auto-updated May 26, 2026

⚠️ Active exploitation confirmed. Patch available.

generic Patch Available

[R1] Stand-alone Security Patch Available for Tenable.sc versions 5.19.0 to 5.20.1: Patch 202204.1 - Security Advisory | Tenable®

https://www.tenable.com/security/tns-2022-08

generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20220321-0001/

generic

Apache HTTPD: Multiple Vulnerabilities (GLSA 202208-20) — Gentoo security

https://security.gentoo.org/glsa/202208-20

generic

[SECURITY] Fedora 34 Update: httpd-2.4.53-1.fc34 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7H26WJ6TPKNWV3QKY4BHKUKQVUTZJTD/

generic

[SECURITY] Fedora 36 Update: httpd-2.4.53-1.fc36 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X73C35MMMZGBVPQQCH7LQZUMYZNQA5FO/

generic

[SECURITY] Fedora 35 Update: httpd-2.4.53-1.fc35 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGWILBORT67SHMSLYSQZG2NMXGCMPUZO/

generic Patch Available

[SECURITY] [DLA 2960-1] apache2 security update

https://lists.debian.org/debian-lts-announce/2022/03/msg00033.html

generic Patch Available🔴 Active Exploitation

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

https://httpd.apache.org/security/vulnerabilities_24.html

generic

oss-security - CVE-2022-23943: Apache HTTP Server: mod_sed: Read/write beyond bounds

http://www.openwall.com/lists/oss-security/2022/03/14/1

Patch Availability(7)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	apache2-bin (2.4.48-3.1ubuntu3.3) @ impish	2026-05-26	ubuntu
ubuntu	apache2-bin (2.4.18-2ubuntu3.17+esm5) @ xenial	2026-05-26	ubuntu
redhat	jbcs-httpd24-httpd	2022-12-08	redhat
redhat	jbcs-httpd24-httpd-0:2.4.51-37.el7jbcs	2022-12-08	redhat
redhat	httpd-0:2.4.53-7.el9	2022-11-15	redhat
redhat	httpd:2.4-8070020220725152258.3b9f49c4	2022-11-08	redhat
redhat	httpd24-httpd-0:2.4.34-23.el7.5	2022-09-29	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(8)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 10× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 06:09 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 01:43 UTCEG score recompute
2026-05-26 01:43 UTCVendor advisory
2026-05-26 01:43 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2022-23943?

CVE-2022-23943 is a critical vulnerability published on March 14, 2022. Out-of-bounds Write vulnerability in mod_sed of Apache HTTP Server allows an attacker to overwrite heap memory with possibly attacker provided data. This issue affects Apache HTTP Server 2.4 version 2.4.52 and prior versions.

When was CVE-2022-23943 disclosed?

CVE-2022-23943 was first published in the National Vulnerability Database on March 14, 2022, with the most recent update on May 1, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2022-23943 actively exploited?

CVE-2022-23943 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2022-23943?

CVE-2022-23943 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2022-23943?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-23943, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2022-23943

Explore →

Is Your Infrastructure Affected by CVE-2022-23943?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2022-23943

Published

Last Modified

Advisory Details (9)

[R1] Stand-alone Security Patch Available for Tenable.sc versions 5.19.0 to 5.20.1: Patch 202204.1 - Security Advisory | Tenable®

NetApp Product Security

Apache HTTPD: Multiple Vulnerabilities (GLSA 202208-20) — Gentoo security

[SECURITY] Fedora 34 Update: httpd-2.4.53-1.fc34 - package-announce - Fedora mailing-lists

[SECURITY] Fedora 36 Update: httpd-2.4.53-1.fc36 - package-announce - Fedora mailing-lists

[SECURITY] Fedora 35 Update: httpd-2.4.53-1.fc35 - package-announce - Fedora mailing-lists

[SECURITY] [DLA 2960-1] apache2 security update

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

oss-security - CVE-2022-23943: Apache HTTP Server: mod_sed: Read/write beyond bounds

Patch Availability(7)

Weakness Classification(2)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2022-23943?

Same vendor

Same CWE

CVE-2022-23943

📅 Published

🔄 Last Modified

📋 Advisory Details (9)

[R1] Stand-alone Security Patch Available for Tenable.sc versions 5.19.0 to 5.20.1: Patch 202204.1 - Security Advisory | Tenable®

NetApp Product Security

Apache HTTPD: Multiple Vulnerabilities (GLSA 202208-20) — Gentoo security

[SECURITY] Fedora 34 Update: httpd-2.4.53-1.fc34 - package-announce - Fedora mailing-lists

[SECURITY] Fedora 36 Update: httpd-2.4.53-1.fc36 - package-announce - Fedora mailing-lists

[SECURITY] Fedora 35 Update: httpd-2.4.53-1.fc35 - package-announce - Fedora mailing-lists

[SECURITY] [DLA 2960-1] apache2 security update

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

oss-security - CVE-2022-23943: Apache HTTP Server: mod_sed: Read/write beyond bounds

Patch Availability(7)

Weakness Classification(2)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2022-23943?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

Same CWE

Published

Last Modified

Advisory Details (9)

Frequently asked(5)

Related CVEs(same vendor + same CWE)