CVE-2024-27316
HighHTTP/2 incoming headers exceeding the limit are temporarily buffered in nghttp2 in order to generate an informative HTTP 413 response.
Published Apr 4, 2024 · Updated Sep 23, 2026 · Also known as ALPINE-CVE-2024-27316, BIT-apache-2024-27316, DEBIAN-CVE-2024-27316, UBUNTU-CVE-2024-27316
Key Facts
Patch immediately- CVE-2024-27316 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting HTTP Server (Apache), Ontap (Netapp), Fedora (Fedoraproject) and 22 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 91% probability of exploitation in the next 30 days.
- Fixed versions are available, including apache 2.4.59, HTTP Server 2.4.59, apache2 2.4.18-2ubuntu3.17+esm12.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (30-day exploit likelihood)
91%
Higher than 99.8% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2024-27316 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
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.
Affected Products
352 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| HTTP ServerApache | >= 2.4.17 | 2.4.59 |
| OntapNetapp | 9 | n/a |
| FedoraFedoraproject | 38, 39, 40 | n/a |
| apache2alpine | See advisory | 2.4.59-r0 |
| apachebitnami | >= 2.4.17 | 2.4.59 |
Patched Releases
apache
2.4.59
HTTP Server
2.4.59
apache2
2.4.18-2ubuntu3.17+esm12, 2.4.29-1ubuntu4.27+esm2, 2.4.41-4ubuntu3.17, 2.4.51-150200.3.62.1, 2.4.51-150400.6.17.1, 2.4.51-35.41.1, 2.4.52-1ubuntu4.9, 2.4.58-150600.5.3.1, 2.4.58-1ubuntu8.1, 2.4.59-1, 2.4.59-1~deb10u1, 2.4.59-1~deb11u1, 2.4.59-1~deb12u1, 2.4.59-r0, 2.4.66-150400.6.57.1
apache2-devel
2.4.51-150200.3.62.1, 2.4.51-150400.6.17.1, 2.4.51-35.41.1, 2.4.58-150600.5.3.1, 2.4.66-150400.6.57.1
apache2-doc
2.4.51-150200.3.62.1, 2.4.51-150400.6.17.1, 2.4.51-35.41.1, 2.4.66-150400.6.57.1
apache2-event
2.4.51-150400.6.17.1, 2.4.58-150600.5.3.1
apache2-example-pages
2.4.51-150400.6.17.1, 2.4.51-35.41.1
apache2-manual
2.4.58-150600.5.3.1
apache2-prefork
2.4.51-150200.3.62.1, 2.4.51-150400.6.17.1, 2.4.51-35.41.1, 2.4.58-150600.5.3.1, 2.4.66-150400.6.57.1
apache2-tls13
2.4.51-35.41.1
apache2-tls13-devel
2.4.51-35.41.1
apache2-tls13-doc
2.4.51-35.41.1
apache2-tls13-example-pages
2.4.51-35.41.1
apache2-tls13-prefork
2.4.51-35.41.1
apache2-tls13-utils
2.4.51-35.41.1
apache2-tls13-worker
2.4.51-35.41.1
apache2-utils
2.4.51-150200.3.62.1, 2.4.51-150400.6.17.1, 2.4.51-35.41.1, 2.4.58-150600.5.3.1, 2.4.66-150400.6.57.1
apache2-worker
2.4.51-150200.3.62.1, 2.4.51-150400.6.17.1, 2.4.51-35.41.1, 2.4.58-150600.5.3.1, 2.4.66-150400.6.57.1
eap7-apache-commons-beanutils
0:1.11.0-1.redhat_00001.1.el7eap
eap7-bouncycastle
0:1.78.1-1.redhat_00002.1.el7eap, 0:1.78.1-1.redhat_00002.1.el8eap, 0:1.78.1-1.redhat_00002.1.el9eap
eap7-hal-console
0:3.3.23-1.Final_redhat_00001.1.el7eap, 0:3.3.23-1.Final_redhat_00001.1.el8eap, 0:3.3.23-1.Final_redhat_00001.1.el9eap
eap7-hibernate-validator
0:5.3.6-1.SP1_redhat_00001.1.ep7.el7
eap7-hornetq
0:2.4.11-1.Final_redhat_00001.1.ep7.el7
eap7-ironjacamar
0:1.5.17-1.Final_redhat_00001.1.el7eap, 0:1.5.17-1.Final_redhat_00001.1.el8eap, 0:1.5.17-1.Final_redhat_00001.1.el9eap
eap7-jandex
0:2.4.5-1.Final_redhat_00001.1.el7eap, 0:2.4.5-1.Final_redhat_00001.1.el8eap, 0:2.4.5-1.Final_redhat_00001.1.el9eap
Timeline
Publicly disclosed
Apr 4, 2024
Last updated
Sep 23, 2026
Weakness Type
- CWE-400 Uncontrolled Resource Consumption
- CWE-770 Allocation of Resources Without Limits or Throttling
References
- advisoryRHSA-2024:1786
- advisoryRHSA-2024:1872
- advisoryRHSA-2024:2564
- advisoryRHSA-2024:2693
- advisoryRHSA-2024:2694
FAQ
Common Questions.
HTTP/2 incoming headers exceeding the limit are temporarily buffered in nghttp2 in order to generate an informative HTTP 413 response.
Affected: HTTP Server (Apache) versions >= 2.4.17; Ontap (Netapp) versions 9; Fedora (Fedoraproject) versions 38, 39, 40, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including apache 2.4.59, HTTP Server 2.4.59, apache2 2.4.18-2ubuntu3.17+esm12.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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