CVE-2007-3564

libcurl 7.14.0 through 7.16.3, when built with GnuTLS support, does not check SSL/TLS certificate...

7.5 HighFix available

libcurl 7.14.0 through 7.16.3, when built with GnuTLS support, does not check SSL/TLS certificate expiration or activation dates, which allows remote attackers to bypass certain access restrictions.

Exploit likelihood

2.30%Up 0.1 points since Feb 4, 2022

What each source reports

NVD Score used 7.5

libcurl 7.14.0 through 7.16.3, when built with GnuTLS support, does not check SSL/TLS certificate expiration or activation dates, which allows remote attackers to bypass certain access restrictions.

Record: CVE-2007-3564
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Updated: 2026-11-02

CVE List No score

libcurl 7.14.0 through 7.16.3, when built with GnuTLS support, does not check SSL/TLS certificate expiration or activation dates, which allows remote attackers to bypass certain access restrictions.

Record: CVE-2007-3564
Updated: 2026-11-02

EUVDEUVD-2007-3548 No score

libcurl 7.14.0 through 7.16.3, when built with GnuTLS support, does not check SSL/TLS certificate expiration or activation dates, which allows remote attackers to bypass certain access restrictions.

Record: EUVD-2007-3548
Updated: 2026-11-03

GitHub AdvisoriesGHSA-83vp-5vg4-r3g7 No score

libcurl 7.14.0 through 7.16.3, when built with GnuTLS support, does not check SSL/TLS certificate...

libcurl 7.14.0 through 7.16.3, when built with GnuTLS support, does not check SSL/TLS certificate expiration or activation dates, which allows remote attackers to bypass certain access restrictions.

Record: GHSA-83vp-5vg4-r3g7
Updated: 2026-11-02

OSVCURL-CVE-2007-3564 No score

GnuTLS insufficient cert verification

libcurl (when built to use GnuTLS) fails to verify that a peer's certificate has not already expired or has not yet become valid. This allows malicious servers to present certificates to libcurl that were not rejected properly.

Notably, the CA certificate and common name checks are still in place which reduces the risk for random servers to take advantage of this flaw.

Record: CURL-CVE-2007-3564
Updated: 2026-11-02

OSV No score

libcurl 7.14.0 through 7.16.3, when built with GnuTLS support, does not check SSL/TLS certificate expiration or activation dates, which allows remote attackers to bypass certain access restrictions.

Record: CVE-2007-3564
Updated: 2026-11-02

OSVDEBIAN-CVE-2007-3564 No score

libcurl 7.14.0 through 7.16.3, when built with GnuTLS support, does not check SSL/TLS certificate expiration or activation dates, which allows remote attackers to bypass certain access restrictions.

Record: DEBIAN-CVE-2007-3564
Updated: 2026-11-02

Affected products

libcurl

Affected packages

Affected packages
Package	Affected	Fixed
`curl` Debian:12	before 7.16.4-1	7.16.4-1
`curl` Debian:13	before 7.16.4-1	7.16.4-1
`curl` Debian:14	before 7.16.4-1	7.16.4-1
`curl` Debian:4.0	before 7.15.5-1etch1, plus listed versions 7.15.5-1	7.15.5-1etch1

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	affected, aliases, facts, published, references, title	GitHub Advisories, OSV
Nov 2, 2026	first indexed	CVE List, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2007-3564 is a high vulnerability (CVSS 7.5) in Libcurl, published July 10, 2007. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.30%, the 83rd percentile. Fixed in curl 7.16.4-1.

References

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