High 8.6Published Mar 27, 2024

CVE-2024-2398HTTP/2 push headers memory-leak

Updated under an hour ago (Oct 26, 2026, 3:00 PM ET)

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It affects curl and 19 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

When an application tells libcurl it wants to allow HTTP/2 server push, and the amount of received headers for the push surpasses the maximum allowed limit (1000), libcurl aborts the server push. When aborting, libcurl inadvertently does not free all the previously allocated headers and instead leaks the memory. Further, this error condition fails silently and is therefore not easily detected by an application.

CVSS: 8.6 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Weakness (CWE): CWE-772
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: curl
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

curl curl curl:curl (from the name)	from 8.6.0 through 8.6.0; from 8.5.0 through 8.5.0; from 8.4.0 through 8.4.0; from 8.3.0 through 8.3.0; from 8.2.1 through 8.2.1; from 8.2.0 through 8.2.0; from 8.1.2 through 8.1.2; from 8.1.1 through 8.1.1; and 69 more ranges	CNA record
curl curl curl:curl	from 7.44.0 through 8.6.0	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.0 before V3.1.5	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.0 before V3.1.5	CISA ADP
Siemens SINEMA Remote Connect Client siemens:sinema_remote_connect_client (from the name)	before V3.2 SP2	CISA ADP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.0 before V3.1.5	CISA ADP
Siemens SINEC NMS siemens:sinec_nms (from the name)	before V3.0 SP1	CISA ADP
haxx curl haxx:curl	from 7.44.0 before 8.7.0	NVD
apple macos apple:macos	before 12.7.6; from 13.0 before 13.6.8; from 14.0 before 14.6	NVD
fedoraproject fedora fedoraproject:fedora	39; 40	NVD
1–10 of 21

References

References

https://curl.se/docs/CVE-2024-2398.json	vendor-advisory
https://curl.se/docs/CVE-2024-2398.html	vendor-advisory
https://hackerone.com/reports/2402845	exploit, issue-tracking, third-party-advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GMD6UYKCCRCYETWQZUJ65ZRFULT6SHLI/	third-party-advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2D44YLAUFJU6BZ4XFG2FYV7SBKXB5IZ6/	third-party-advisory
http://www.openwall.com/lists/oss-security/2024/03/27/3	mailing-list, third-party-advisory
https://security.netapp.com/advisory/ntap-20240503-0009/	third-party-advisory
https://support.apple.com/kb/HT214119	release-notes, vendor-advisory
https://support.apple.com/kb/HT214118	release-notes, vendor-advisory
https://support.apple.com/kb/HT214120	release-notes, vendor-advisory
1–10 of 16

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.