CVE-2024-2466TLS certificate check bypass with mbedTLS
Updated under an hour ago ()
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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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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 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
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 |
netapp bootstrap_os netapp:bootstrap_os | all versions | NVD |
netapp h300s_firmware netapp:h300s_firmware | all versions | NVD |
netapp h410s_firmware netapp:h410s_firmware | all versions | NVD |
netapp h500s_firmware netapp:h500s_firmware | all versions | NVD |
References
- https://curl.se/docs/CVE-2024-2466.jsonvendor-advisory
- https://curl.se/docs/CVE-2024-2466.htmlvendor-advisory
- https://hackerone.com/reports/2416725exploit, issue-tracking, third-party-advisory
- http://www.openwall.com/lists/oss-security/2024/03/27/4mailing-list, third-party-advisory
- https://security.netapp.com/advisory/ntap-20240503-0010/third-party-advisory
- https://support.apple.com/kb/HT214119release-notes, vendor-advisory
- https://support.apple.com/kb/HT214118release-notes, vendor-advisory
- https://support.apple.com/kb/HT214120release-notes, vendor-advisory
- http://seclists.org/fulldisclosure/2024/Jul/20mailing-list, third-party-advisory
- http://seclists.org/fulldisclosure/2024/Jul/18mailing-list, third-party-advisory
- http://seclists.org/fulldisclosure/2024/Jul/19mailing-list, third-party-advisory
- https://www.vicarius.io/vsociety/posts/tls-certificate-check-bypass-curl-with-mbedtls-cve-2024-2466-2468exploit, mitigation, third-party-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-331112.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-417159.html
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.