No exploitation reportedFix available

CVE-2022-23943

Q: Is CVE-2022-23943 actively exploited?

Active exploitation of CVE-2022-23943 has not been confirmed. Its EPSS score was 50.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2022-23943?

CVE-2022-23943 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2022-03-14
WeaknessCWE-190 · CWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2022-03-1411:15CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-23943?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-23943?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Fedoraproject fedora

Branch	Affected	Fixed in	Source
34.x	= 34	no fix published	NVD
35.x	= 35	no fix published	NVD
36.x	= 36	no fix published	NVD

Apache HTTP Server

Branch	Affected	Fixed in	Source
2.4	≥ 2.4.0, < 2.4.53	2.4.53	NVD
2.4	< 2.4.53	2.4.53	OSV

Oracle http server

Branch	Affected	Fixed in	Source
12.2	= 12.2.1.3.0	no fix published	NVD
12.2	= 12.2.1.4.0	no fix published	NVD

2 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

httpdAlmaLinux:9all versions · fixed in 2.4.53-7.el9and 8 other packages
httpdAlmaLinux:8all versions · fixed in 2.4.37-51.module_el8.7.0+3281+01e58653and 6 other packages
mod_http2AlmaLinux:8all versions · fixed in 1.15.7-5.module_el8.6.0+2872+fe0ff7aa
mod_http2AlmaLinux:8all versions · fixed in 1.15.7-5.module_el8.6.0+3031+fb177b09
mod_mdAlmaLinux:8all versions · fixed in 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa
mod_mdAlmaLinux:8all versions · fixed in 1:2.0.8-8.module_el8.6.0+3031+fb177b09
mod_sslAlmaLinux:9all versions · fixed in 1:2.4.53-7.el9and 1 other package
mod_sslAlmaLinux:8all versions · fixed in 1:2.4.37-51.module_el8.7.0+3281+01e58653and 1 other package

Full record on NVD

Fix

Advisories and patches

httpd.apache.orgVendor Advisory
www.oracle.comPatch

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
CNAweakness (CWE)CWE-190, CWE-787read 2026-10-23
NVDweakness (CWE)CWE-787read 2026-10-23
FIRST EPSSEPSS score50.4 %read 2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2022-03-14
Last Modified: 2026-06-17
NVD status: Analyzed

Frequently asked questions

What is CVE-2022-23943?

Is CVE-2022-23943 actively exploited?

Active exploitation of CVE-2022-23943 has not been confirmed. Its EPSS score was 50.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

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

CVE-2022-23943 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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