CVE-2026-14741 Affecting libhttp-date-perl package, versions <6.06-1ubuntu0.26.04.1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.35% (28th percentile)

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  • Snyk IDSNYK-UBUNTU2604-LIBHTTPDATEPERL-17940502
  • published24 Jul 2026
  • disclosed17 Jul 2026

Introduced: 17 Jul 2026

NewCVE-2026-14741  (opens in a new tab)

How to fix?

Upgrade Ubuntu:26.04 libhttp-date-perl to version 6.06-1ubuntu0.26.04.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libhttp-date-perl package and not the libhttp-date-perl package as distributed by Ubuntu. See How to fix? for Ubuntu:26.04 relevant fixed versions and status.

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 Base Scores

version 3.1