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GHSA-MCQF-9RR5-V7RW

Vulnerability from github – Published: 2026-07-17 18:31 – Updated: 2026-07-17 18:31

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-14741"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1333"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-17T16:17:13Z",
    "severity": null
  },
  "details": "HTTP::Date versions before 6.08 for Perl allow CPU exhaustion via polynomial regex backtracking in parse_date.\n\nparse_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.\n\nHTTP::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.",
  "id": "GHSA-mcqf-9rr5-v7rw",
  "modified": "2026-07-17T18:31:24Z",
  "published": "2026-07-17T18:31:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-14741"
    },
    {
      "type": "WEB",
      "url": "https://github.com/libwww-perl/HTTP-Date/pull/33"
    },
    {
      "type": "WEB",
      "url": "https://github.com/libwww-perl/HTTP-Date/commit/78c20952cdfbf11e03cf1199ad70f13298a84c5c.patch"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/OALDERS/HTTP-Date-6.08/changes"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/07/17/10"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-14741 (GCVE-0-2026-14741)

Vulnerability from cvelistv5 – Published: 2026-07-17 15:20 – Updated: 2026-07-17 17:25

Title

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

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.

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-1333 - Inefficient Regular Expression Complexity

Assigner

CPANSec

References

4 references

URL	Tags
https://github.com/libwww-perl/HTTP-Date/commit/7…	patch
https://github.com/libwww-perl/HTTP-Date/pull/33	issue-tracking
https://metacpan.org/release/OALDERS/HTTP-Date-6.…	release-notes
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
OALDERS	HTTP::Date	Affected: 0 , < 6.08 (custom)

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JSON

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  "containers": {
    "adp": [
      {
        "metrics": [
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            "other": {
              "content": {
                "id": "CVE-2026-14741",
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                  },
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-17T16:21:02.806513Z",
                "version": "2.0.3"
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          "defaultStatus": "unaffected",
          "packageName": "HTTP-Date",
          "product": "HTTP::Date",
          "programFiles": [
            "lib/HTTP/Date.pm"
          ],
          "programRoutines": [
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              "name": "HTTP::Date::str2time"
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          "versions": [
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              "status": "affected",
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      "source": {
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          "time": "2026-07-09T00:00:00.000Z",
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  "cveMetadata": {
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    "datePublished": "2026-07-17T15:20:07.201Z",
    "dateReserved": "2026-07-04T11:57:33.964Z",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-MCQF-9RR5-V7RW

CVE-2026-14741 (GCVE-0-2026-14741)

Tags

Sightings

Nomenclature