# CVE-2026-14741: libhttp-date-perl: HTTP::Date versions before 6.08 for Perl allow CPU exhaustion via polynomial regex backtracking in parse_date

CVE-2026-14741 is fixed in 3 products on 1 platform, first by libhttp-date-perl 6.06-1ubuntu0.26.04.1, released July 9, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-14741
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0063
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 9, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libhttp-date-perl Debian 14 | 6.08-1 | [DEBIAN-CVE-2026-14741](https://patchblox.com/security/data/fix/linux/debian-cve-2026-14741.md) | Jul 12, 2026 |
| Linux | libhttp-date-perl Ubuntu 22.04.1 LTS (jammy) | 6.05-1ubuntu0.1 | [libhttp-date-perl 6.05-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libhttp-date-perl-6.05-1ubuntu0.1.md) | Jul 24, 2026 |
| Linux | libhttp-date-perl Ubuntu 24.04.5 LTS (noble) | 6.06-1ubuntu0.24.04.1 | [libhttp-date-perl 6.06-1ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libhttp-date-perl-6.06-1ubuntu0.24.04.1.md) | Jul 24, 2026 |
| Linux | libhttp-date-perl Ubuntu 26.04.1 LTS (resolute) | 6.06-1ubuntu0.26.04.1 | [libhttp-date-perl 6.06-1ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libhttp-date-perl-6.06-1ubuntu0.26.04.1.md) | Jul 9, 2026 |
| Linux | perl-HTTP-Date amzn 2023 | 6.08-2.amzn2023.0.1 | [ALAS2023-2026-3210](https://patchblox.com/security/data/fix/linux/alas2023-2026-3210.md) | Nov 7, 2026 |
| Linux | perl-HTTP-Date opensuse-leap 16.0 | 6.06-160000.3.1 | [OPENSUSE-SU-2026:21427-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21427-1.md) | Jul 22, 2026 |
| Linux | perl-HTTP-Date sles 15.7 | 6.02-150000.3.3.1 | [SUSE-SU-2026:3454-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3454-1.md) | Aug 3, 2026 |
| Linux | perl-HTTP-Date sles 16.0 | 6.06-160000.3.1 | [SUSE-SU-2026:22859-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22859-1.md) | Jul 22, 2026 |
| Linux | perl-HTTP-Date-tests amzn 2023 | 6.08-2.amzn2023.0.1 | [ALAS2023-2026-3210](https://patchblox.com/security/data/fix/linux/alas2023-2026-3210.md) | Nov 7, 2026 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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