CVE-2023-38709

HIGHNVD 7.37.3—Elevated

7.3

Faulty input validation in the core of Apache allows malicious or exploitable backend/content generators to split HTTP responses.

This issue affects Apache HTTP Server: through 2.4.58.

CVSS v3: 7.3
EG Score: 7.3(medium)
EPSS: 89.1%
KEV: Not listed

Published

April 4, 2024

Last Modified

November 4, 2025

References (20)

security@apachehttp://seclists.org/fulldisclosure/2024/Jul/18
security@apachehttp://www.openwall.com/lists/oss-security/2024/04/04/3
security@apachehttps://httpd.apache.org/security/vulnerabilities_24.html
security@apachehttps://lists.debian.org/debian-lts-announce/2024/05/msg00013.html
security@apachehttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I2N2NZEX3MR64IWSGL3QGN7KSRUGAEMF/
security@apachehttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LX5U34KYGDYPRH3AJ6MDDCBJDWDPXNVJ/
security@apachehttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WNV4SZAPVS43DZWNFU7XBYYOZEZMI4ZC/
security@apachehttps://security.netapp.com/advisory/ntap-20240415-0013/
security@apachehttps://support.apple.com/kb/HT214119
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2024/Jul/18
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2024/04/04/3
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2025/07/10/2
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2025/07/10/3
af854a3a-2127-422b-91ae-364da2661108https://httpd.apache.org/security/vulnerabilities_24.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/05/msg00013.html

Patch Availability(7)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	apache2-utils (2.4.18-2ubuntu3.17+esm12) @ xenial	2026-05-24	ubuntu
ubuntu	libapache2-mod-proxy-uwsgi (2.4.57-2ubuntu2.4) @ mantic	2026-05-24	ubuntu
ubuntu	libapache2-mod-proxy-uwsgi (2.4.58-1ubuntu8.1) @ noble	2026-05-24	ubuntu
redhat	httpd-0:2.4.62-1.el9	2024-11-12	redhat
redhat	jbcs-httpd24-httpd-0:2.4.57-15.el7jbcs	2024-09-24	redhat
redhat	httpd	2024-09-24	redhat
redhat	httpd:2.4-8100020240612075645.489197e6	2024-07-01	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(1)

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

CWE-1284Improper Validation of Specified Quantity in Input

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 14× in last 7d / 20× 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.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
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2026-05-31 00:15 UTCepss_batch
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2026-05-29 13:43 UTCepss_batch
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2026-05-28 13:43 UTCepss_batch
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2026-05-26 07:18 UTCepss_batch
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Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCmrmtwoj/apache-vulnerability-testing
First seen Oct 5, 2024
Apache HTTP Server Vulnerability Testing Tool | PoC for CVE-2024-38472 , CVE-2024-39573 , CVE-2024-38477 , CVE-2024-38476 , CVE-2024-38475 , CVE-2024-38474 , CVE-2024-38473 , CVE-2023-38709
Open source ↗

Frequently asked(5)

What is CVE-2023-38709?

CVE-2023-38709 is a high vulnerability published on April 4, 2024. Faulty input validation in the core of Apache allows malicious or exploitable backend/content generators to split HTTP responses. This issue affects Apache HTTP Server: through 2.4.58.

When was CVE-2023-38709 disclosed?

CVE-2023-38709 was first published in the National Vulnerability Database on April 4, 2024, with the most recent update on November 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-38709 actively exploited?

CVE-2023-38709 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 89.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-38709?

CVE-2023-38709 has a CVSS v3 base score of 7.3 (NVD).

How do I remediate CVE-2023-38709?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-38709, 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-2023-38709

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