Medium 6.5Published Mar 27, 2024

CVE-2024-2466TLS certificate check bypass with mbedTLS

Updated under an hour ago (Oct 27, 2026, 7:23 AM ET)

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It affects curl and 13 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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Every CVE for curl

Exploited in the last 30 days

libcurl did not check the server certificate of TLS connections done to a host specified as an IP address, when built to use mbedTLS. libcurl would wrongly avoid using the set hostname function when the specified hostname was given as an IP address, therefore completely skipping the certificate check. This affects all uses of TLS protocols (HTTPS, FTPS, IMAPS, POPS3, SMTPS, etc).

CVSS: 6.5 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness (CWE): CWE-297
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	CNA record
curl libcurl curl:libcurl	from 8.5.0 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 8.5.0 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
netapp h700s_firmware netapp:h700s_firmware	all versions	NVD
1–10 of 14

References

References

https://curl.se/docs/CVE-2024-2466.json	vendor-advisory
https://curl.se/docs/CVE-2024-2466.html	vendor-advisory
https://hackerone.com/reports/2416725	exploit, issue-tracking, third-party-advisory
http://www.openwall.com/lists/oss-security/2024/03/27/4	mailing-list, third-party-advisory
https://security.netapp.com/advisory/ntap-20240503-0010/	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
http://seclists.org/fulldisclosure/2024/Jul/20	mailing-list, third-party-advisory
http://seclists.org/fulldisclosure/2024/Jul/18	mailing-list, third-party-advisory
1–10 of 15

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.