CVE-2026-14741

HTTP::Date versions before 6.08 for Perl allow CPU exhaustion via polynomial regex backtracking in parse_date. parse_date() matches the date string against a chain of alternative regexes, and str2time() delegates to it. Several of these patterns place unbounded quantifiers next to each other before a trailing `\s*$` anchor. A valid date prefix followed by a long interior run of digits, letters, or whitespace and a single trailing byte that defeats the final match forces the engine to repartition the run, giving polynomial (about quadratic) backtracking. A header value of a few tens of kilobytes runs for tens of seconds of CPU. HTTP::Date parses timestamps such as HTTP `Date`, `Expires`, and `Last-Modified` headers, which commonly originate from untrusted sources. Any caller that passes an untrusted date header to str2time() or parse_date() can be driven to consume unbounded CPU, a denial of service.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/libwww-perl/HTTP-Date/commit/78c20952cdfbf11e03cf1199ad70f13298a84c5c.patch
https://github.com/libwww-perl/HTTP-Date/pull/33
https://metacpan.org/release/OALDERS/HTTP-Date-6.08/changes
http://www.openwall.com/lists/oss-security/2026/07/17/10

Configurations

No configuration.

History

21 Jul 2026, 15:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5

17 Jul 2026, 18:17

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/07/17/10 -

17 Jul 2026, 16:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-17 16:17

Updated : 2026-07-21 15:16

NVD link : CVE-2026-14741

Mitre link : CVE-2026-14741

CVE.ORG link : CVE-2026-14741

JSON object : View

Products Affected

No product.

CWE

CWE-1333

Inefficient Regular Expression Complexity

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