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Fencer Vulns
high 7.5

CVE-2026-14741 json

HTTP::Date versions before 6.08 for Perl allow CPU exhaustion via polynomial regex backtracking in parse_date

published 2026-07-17 3 mo ago modified 2026-10-24 15 d ago also EUVD-2026-45190

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

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.

Patch / fix

  • OALDERS HTTP::Date 6.08
  • libhttp-date-perl Debian 14 6.08-1

debian advisories DEBIAN-CVE-2026-14741

  • libhttp-date-perl Ubuntu 22.04 LTS 6.05-1ubuntu0.1
  • libhttp-date-perl Ubuntu 24.04 LTS 6.06-1ubuntu0.24.04.1
  • libhttp-date-perl Ubuntu 26.04 LTS 6.06-1ubuntu0.26.04.1

ubuntu advisories UBUNTU-CVE-2026-14741

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • perl-HTTP-Date SLE Module for Basesystem 15 SP7 6.02-150000.3.3.1
  • perl-HTTP-Date SLES for SAP applications 16.0, SLES 16.0 6.06-160000.3.1
  • perl-HTTP-Date SLES LTSS Extended Security 12 SP5 6.02-9.3.1

suse advisories SUSE-SU-2026:3454-1SUSE-SU-2026:3334-1SUSE-SU-2026:22859-1

  • perl-HTTP-Date openSUSE Tumbleweed 6.80.0-1.1
  • perl-HTTP-Date openSUSE Leap 16.0 6.06-160000.3.1

opensuse advisories openSUSE-SU-2026:11350-1openSUSE-SU-2026:21427-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-14741 updated cvss 7.5

HTTP::Date: HTTP::Date: Denial of Service via crafted HTTP date headers

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • OALDERS HTTP::Date

Classification

Weakness
  • CWE-1333 Inefficient Regular Expression Complexity

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.