CVE-2025-4947 — Improper Certificate Validation in Curl

CWE-295 — Improper Certificate Validation8 documents8 sources
Severity
6.5MEDIUMNVD
EPSS
0.1%
top 77.37%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Haxx CurlCurl
Timeline
PublishedMay 28

Description

libcurl accidentally skips the certificate verification for QUIC connections when connecting to a host specified as an IP address in the URL. Therefore, it does not detect impostors or man-in-the-middle attacks.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NExploitability: 3.9 | Impact: 2.5

Affected Packages3 packages

▶NVDhaxx/curl8.8.0 — 8.14.0
▶Debianhaxx/curl< 8.14.0-1+1
▶CVEListV5curl/curl8.13.0 — 8.13.0+9

Patches

Patch: curl.se ↗Patch: hackerone.com ↗Patch: www.openwall.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-ppfq-jg49-mqj4: libcurl accidentally skips the certificate verification for QUIC connections when connecting to a host specified as an IP address in the URL↗2025-05-28
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CVEList
QUIC certificate check skip with wolfSSL↗2025-05-28
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OSV
CVE-2025-4947: libcurl accidentally skips the certificate verification for QUIC connections when connecting to a host specified as an IP address in the URL↗2025-05-28
▶

📋Vendor Advisories

3
Red Hat
libcurl: curl: QUIC certificate check skip with wolfSSL↗2025-05-28
▶
Microsoft
QUIC certificate check skip with wolfSSL↗2025-05-13
▶
Debian
CVE-2025-4947: curl - libcurl accidentally skips the certificate verification for QUIC connections whe...↗2025
▶

💬Community

1
HackerOne
CVE-2025-4947: QUIC certificate check skip with wolfSSL↗2025-05-28
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CVE-2025-4947 — Improper Certificate Validation in Curl | cvebase