CVE-2024-2466 | TLS certificate check bypass with mbedTLS

Exp

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).

Published: 2024-03-27 Last update: 2026-06-17 Assigner: 2499f714-1537-4658-8207-48ae4bb9eae9 Source: 2499f714-1537-4658-8207-48ae4bb9eae9
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-2466 is rated High Exploit Risk (65.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.30%). 2 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.15% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2024-2466

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2024-2466

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.15% 1.30% +1.15%
2 2026-03-04 0.22% 0.15% -0.07%
3 2026-03-01 — 0.22% —

Full EPSS history (32 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-2466

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 2.5 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2024-2466

OS Trackers for CVE-2024-2466

vendor priority summary link
alpine — CVE-2024-2466: 1 source package rows (curl); 207 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 7, open 200. https://security.alpinelinux.org/vuln/CVE-2024-2466
debian unimportant CVE-2024-2466 unimportant priority: Debian including 1 source packages (curl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2024-2466
gentoo normal CVE-2024-2466: 1 GLSA(s) (202409-20), 1 atom(s) (net-misc/curl); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2024-2466
redhat medium — https://access.redhat.com/security/cve/CVE-2024-2466
suse medium — https://www.suse.com/security/cve/CVE-2024-2466/
ubuntu medium CVE-2024-2466 medium priority: Ubuntu including 1 source packages (curl), 8 status rows across 8 suites (bionic, focal, jammy, mantic, noble, trusty, upstream, xenial): not-affected 7, released 1. https://ubuntu.com/security/CVE-2024-2466

Affected software / configurations for CVE-2024-2466

Vendor Product Version Raw CPE
haxx curl >= 8.5.0, < 8.7.0 cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*
apple macos < 12.7.6 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple macos >= 13.0, < 13.6.8 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple macos >= 14.0, < 14.6 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
netapp h700s_firmware — cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
netapp bootstrap_os — cpe:2.3:o:netapp:bootstrap_os:-:*:*:*:*:*:*:*
netapp h300s_firmware — cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
netapp h410s_firmware — cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*
netapp h500s_firmware — cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*

References for CVE-2024-2466

URL Tags
http://seclists.org/fulldisclosure/2024/Jul/18 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2024/Jul/19 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2024/Jul/20 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2024/03/27/4 Mailing List Third Party Advisory
https://curl.se/docs/CVE-2024-2466.html Vendor Advisory
https://curl.se/docs/CVE-2024-2466.json Vendor Advisory
https://hackerone.com/reports/2416725 Exploit Issue Tracking Third Party Advisory
https://security.netapp.com/advisory/ntap-20240503-0010/ Third Party Advisory
https://support.apple.com/kb/HT214118 Release Notes Vendor Advisory
https://support.apple.com/kb/HT214119 Release Notes Vendor Advisory
https://support.apple.com/kb/HT214120 Release Notes Vendor Advisory
https://www.vicarius.io/vsociety/posts/tls-certificate-check-bypass-curl-with-mbedtls-cve-2024-2466-2468 Exploit Mitigation Third Party Advisory
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