CVE-2024-27316

HIGHNVD 7.59.0▲Elevated

7.5

HTTP/2 incoming headers exceeding the limit are temporarily buffered in nghttp2 in order to generate an informative HTTP 413 response. If a client does not stop sending headers, this leads to memory exhaustion.

CVSS v3: 7.5
EG Score: 9.0(high)
EPSS: 99.5%
KEV: Not listed

Published

April 4, 2024

Last Modified

November 4, 2025

References (15)

security@apachehttp://seclists.org/fulldisclosure/2024/Jul/18
security@apachehttp://www.openwall.com/lists/oss-security/2024/04/04/4
security@apachehttps://httpd.apache.org/security/vulnerabilities_24.html
security@apachehttps://support.apple.com/kb/HT214119
security@apachehttps://www.openwall.com/lists/oss-security/2024/04/03/16
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2024/Jul/18
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2024/04/04/4
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
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FO73U3SLBYFGIW2YKXOK7RI4D6DJSZ2B/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MIUBKSCJGPJ6M2U63V6BKFDF725ODLG7/
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20240415-0013/
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT214119
af854a3a-2127-422b-91ae-364da2661108https://www.kb.cert.org/vuls/id/421644
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2024/04/03/16

Patch Availability(19)

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 (2.4.58-1ubuntu8.1) @ noble	2026-05-24	ubuntu
ubuntu	libapache2-mod-proxy-uwsgi (2.4.57-2ubuntu2.4) @ mantic	2026-05-24	ubuntu
redhat	eap7-wildfly-0:7.3.15-5.GA_redhat_00003.1.el7eap	2025-09-25	redhat
redhat	eap7-wildfly-0:7.1.12-2.GA_redhat_00002.1.ep7.el7	2025-09-25	redhat
redhat	HTTP-2	2024-08-08	redhat
redhat	eap7-wildfly-0:7.4.18-1.GA_redhat_00001.1.el8eap	2024-08-08	redhat
redhat	eap7-wildfly-0:7.4.18-1.GA_redhat_00001.1.el9eap	2024-08-08	redhat
redhat	eap7-wildfly-0:7.4.18-1.GA_redhat_00001.1.el7eap	2024-08-08	redhat
redhat	eap8-wildfly-0:8.0.2-5.GA_redhat_00012.1.el9eap	2024-07-08	redhat
redhat	mod_http2-0:1.15.19-3.el9_0.6	2024-05-28	redhat
redhat	mod_http2-0:1.15.19-4.el9_2.6	2024-05-28	redhat
redhat	httpd:2.4-8060020240422183714.ad008a3a	2024-05-20	redhat
redhat	httpd:2.4-8080020240502175002.63b34585	2024-05-16	redhat
redhat	jbcs-httpd24-httpd	2024-05-07	redhat
redhat	jbcs-httpd24-nghttp2-0:1.43.0-13.el7jbcs	2024-05-07	redhat
redhat	mod_http2-0:2.0.26-2.el9_4	2024-04-30	redhat
redhat	mod_http2-0:1.15.19-5.el9_3.1	2024-04-18	redhat
redhat	httpd:2.4-8090020240405093943.a75119d5	2024-04-11	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

(21)

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 7× in last 7d / 17× 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.

2026-06-04 13:11 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-24 05:10 UTCEG score recompute
2026-05-24 05:10 UTCVendor advisory
2026-05-24 05:10 UTCGHSA enrichment

Publicly available exploits

(2 references)

Working exploit code is in the public domain (2 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCaeyesec/CVE-2024-27316_poc
First seen Apr 17, 2024
Open source ↗
GitHub PoClockness-Ko/CVE-2024-27316
First seen Apr 9, 2024
Proof of concept (PoC) for CVE-2024-27316 (tested), CVE-2024-30255 (untested), CVE-2024-31309 (untested), CVE-2024-28182 (untested), CVE-2024-2653 (untested) and CVE-2024-27919 (untested)
Open source ↗

Frequently asked(5)

What is CVE-2024-27316?

CVE-2024-27316 is a high vulnerability published on April 4, 2024. HTTP/2 incoming headers exceeding the limit are temporarily buffered in nghttp2 in order to generate an informative HTTP 413 response. If a client does not stop sending headers, this leads to memory exhaustion.

When was CVE-2024-27316 disclosed?

CVE-2024-27316 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-2024-27316 actively exploited?

CVE-2024-27316 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2024-27316?

CVE-2024-27316 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.

How do I remediate CVE-2024-27316?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-27316, 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-2024-27316

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CVE-2024-27316

Published

Last Modified

References (15)

Patch Availability(19)

Weakness Classification(2)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2024-27316?

Same vendor

Same CWE

CVE-2024-27316

📅 Published

🔄 Last Modified

🔗 References (15)

Patch Availability(19)

Weakness Classification(2)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2024-27316?

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References (15)

Frequently asked(5)

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