🛡️ CVE-2026-14741 on Ubuntu — libhttp-date-perl

⚪ Unknown ✅ No Known Exploit OSV

N/A

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

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.

Distribution advisory

This page covers CVE-2026-14741 as tracked by Ubuntu, for the package libhttp-date-perl. The fix is available in version 6.06-1ubuntu0.26.04.1; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

UBUNTU-CVE-2026-14741 is classified as CWE-1333: Inefficient Regular Expression Complexity. A regular expression backtracks catastrophically on crafted input, consuming CPU out of proportion to input size.

Affected software

UBUNTU-CVE-2026-14741 is recorded against 1 package.

libhttp-date-perl (fixed in 6.06-1ubuntu0.26.04.1)

Timeline and source

Published on 10 July 2026 and last revised on 29 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

ubuntu.com (Report)
www.cve.org (Report)
ubuntu.com (Advisory)

Details

Severity Unknown

CVSS Score N/A

CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE N/A

Public Exploit ✅ No

Source OSV

Published 2026-07-10

Updated 2026-08-12

Modified 2026-07-29

Fix URL N/A

Affected Packages

Software	From version	Fixed in
libhttp-date-perl	—	6.06-1ubuntu0.26.04.1

References

REPORT https://ubuntu.com/security/CVE-2026-14741

REPORT https://www.cve.org/CVERecord?id=CVE-2026-14741

ADVISORY https://ubuntu.com/security/notices/USN-8599-1

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