Vulnerability-Lookup

CVE-2026-77781 (GCVE-0-2026-77781)

Vulnerability from cvelistv5 – Published: 2026-08-21 23:57 – Updated: 2026-08-27 19:12

Title

Tie::Hash::Regex versions before 2.0.0 for Perl will throw an exception on unparseable lookup keys

Summary

Tie::Hash::Regex versions before 2.0.0 for Perl will throw an exception on unparseable lookup keys. The FETCH, EXISTS and DELETE methods throw an exception when on malformed regular expressions. Each method falls back to a regex match when the key is not already stored in the hash, compiling the caller's key with a bare qr// and no eval guard. A key that is not a valid regular expression pattern, such as a single unmatched bracket, dies. An application that looks up externally supplied strings in a tied hash will die on an invalid key.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-27 19:12 UTC

CWE

CWE-248 - Uncaught Exception

Assigner

CPANSec CNA under the redhat root

CNA scorecard C 64/100 over 272 records in the last 180 days details

References

3 references

URL	Tags
https://metacpan.org/release/DAVECROSS/Tie-Hash-R…	release-notes
https://github.com/davorg-cpan/tie-hash-regex/com…	patch
http://www.openwall.com/lists/oss-security/2026/08/22/2

Impacted products

1 product

Vendor	Product	Version	CPE status
		Affected: 0 , < 2.0.0 (custom)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-77781

Vulnerability from fkie_nvd - Published: 2026-08-22 00:16 - Updated: 2026-10-15 19:10

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://github.com/davorg-cpan/tie-hash-regex/commit/4239732cb76233543e2ded8ff5e0f238af152e0c.patch
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://metacpan.org/release/DAVECROSS/Tie-Hash-Regex-2.0.0/source/Changes
	af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/08/22/2

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.openwall.com/lists/oss-security/2026/08/22/2"
    }
  ],
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-248"
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "type": "Secondary"
    }
  ]
}

GHSA-FWMP-GXJ5-29MJ

Vulnerability from github – Published: 2026-08-22 00:31 – Updated: 2026-08-27 21:31

Details

Tie::Hash::Regex versions before 2.0.0 for Perl will throw an exception on unparseable lookup keys.

The FETCH, EXISTS and DELETE methods throw an exception when on malformed regular expressions.

Each method falls back to a regex match when the key is not already stored in the hash, compiling the caller's key with a bare qr// and no eval guard. A key that is not a valid regular expression pattern, such as a single unmatched bracket, dies.

An application that looks up externally supplied strings in a tied hash will die on an invalid key.

Severity

7.5 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-77781"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-248"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-22T00:16:46Z",
    "severity": "HIGH"
  },
  "details": "Tie::Hash::Regex versions before 2.0.0 for Perl will throw an exception on unparseable lookup keys.\n\nThe FETCH, EXISTS and DELETE methods throw an exception when on malformed regular expressions.\n\nEach method falls back to a regex match when the key is not already stored in the hash, compiling the caller\u0027s key with a bare qr// and no eval guard. A key that is not a valid regular expression pattern, such as a single unmatched bracket, dies.\n\nAn application that looks up externally supplied strings in a tied hash will die on an invalid key.",
  "id": "GHSA-fwmp-gxj5-29mj",
  "modified": "2026-08-27T21:31:21Z",
  "published": "2026-08-22T00:31:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77781"
    },
    {
      "type": "WEB",
      "url": "https://github.com/davorg-cpan/tie-hash-regex/commit/4239732cb76233543e2ded8ff5e0f238af152e0c.patch"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/DAVECROSS/Tie-Hash-Regex-2.0.0/source/Changes"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/08/22/2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

UBUNTU-CVE-2026-77781 (CVE-2026-77781)

Vulnerability from osv_ubuntu – Published: 2026-08-22 00:16 – Updated: 2026-10-17 09:52 – Source website

Details

Severity

7.5 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-77781	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-77781	REPORT
	https://lists.security.metacpan.org/cve-announce/…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtie-hash-regex-perl",
            "binary_version": "1.02-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "libtie-hash-regex-perl",
        "purl": "pkg:deb/ubuntu/libtie-hash-regex-perl@1.02-2?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.02-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtie-hash-regex-perl",
            "binary_version": "1.02-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "libtie-hash-regex-perl",
        "purl": "pkg:deb/ubuntu/libtie-hash-regex-perl@1.02-2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.02-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtie-hash-regex-perl",
            "binary_version": "1.12-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libtie-hash-regex-perl",
        "purl": "pkg:deb/ubuntu/libtie-hash-regex-perl@1.12-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.12-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtie-hash-regex-perl",
            "binary_version": "1.14-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libtie-hash-regex-perl",
        "purl": "pkg:deb/ubuntu/libtie-hash-regex-perl@1.14-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.14-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtie-hash-regex-perl",
            "binary_version": "1.14-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libtie-hash-regex-perl",
        "purl": "pkg:deb/ubuntu/libtie-hash-regex-perl@1.14-2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.14-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtie-hash-regex-perl",
            "binary_version": "1.14-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "libtie-hash-regex-perl",
        "purl": "pkg:deb/ubuntu/libtie-hash-regex-perl@1.14-2?arch=source\u0026distro=stonking"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.14-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtie-hash-regex-perl",
            "binary_version": "1.14-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libtie-hash-regex-perl",
        "purl": "pkg:deb/ubuntu/libtie-hash-regex-perl@1.14-2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.14-2"
      ]
    }
  ],
  "aliases": [],
  "details": "Tie::Hash::Regex versions before 2.0.0 for Perl will throw an exception on unparseable lookup keys. The FETCH, EXISTS and DELETE methods throw an exception when on malformed regular expressions. Each method falls back to a regex match when the key is not already stored in the hash, compiling the caller\u0027s key with a bare qr// and no eval guard. A key that is not a valid regular expression pattern, such as a single unmatched bracket, dies. An application that looks up externally supplied strings in a tied hash will die on an invalid key.",
  "id": "UBUNTU-CVE-2026-77781",
  "modified": "2026-10-17T09:52:44Z",
  "published": "2026-08-22T00:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-77781"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-77781"
    },
    {
      "type": "REPORT",
      "url": "https://lists.security.metacpan.org/cve-announce/msg/42893692/"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-77781"
  ]
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-77781 (GCVE-0-2026-77781)

FKIE_CVE-2026-77781

GHSA-FWMP-GXJ5-29MJ

UBUNTU-CVE-2026-77781 (CVE-2026-77781)

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