Vulnerability-Lookup

GHSA-XV5F-QCMP-V8W2

Vulnerability from github – Published: 2026-10-31 15:30 – Updated: 2026-10-31 15:30

Details

WebDyne versions from 2.031 before 3.022 for Perl execute files with .psp anywhere in the name as Perl pages.

WebDyne decides whether to run a requested file as a page by matching its name against WEBDYNE_PSP_EXT_RE, which has no end anchor.

An application that accepts uploads by checking only the final extension lets a remote attacker upload a file such as report.psp.pdf and run its embedded Perl by requesting it.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-78191"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-777"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-31T15:16:54Z",
    "severity": null
  },
  "details": "WebDyne versions from 2.031 before 3.022 for Perl execute files with .psp anywhere in the name as Perl pages.\n\nWebDyne decides whether to run a requested file as a page by matching its name against WEBDYNE_PSP_EXT_RE, which has no end anchor.\n\nAn application that accepts uploads by checking only the final extension lets a remote attacker upload a file such as report.psp.pdf and run its embedded Perl by requesting it.",
  "id": "GHSA-xv5f-qcmp-v8w2",
  "modified": "2026-10-31T15:30:24Z",
  "published": "2026-10-31T15:30:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78191"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/ASPEER/WebDyne-3.022/changes"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-78191 (GCVE-0-2026-78191)

Vulnerability from cvelistv5 – Published: 2026-10-31 14:34 – Updated: 2026-10-31 14:34

Title

WebDyne versions from 2.031 before 3.022 for Perl execute files with .psp anywhere in the name as Perl pages

Summary

WebDyne versions from 2.031 before 3.022 for Perl execute files with .psp anywhere in the name as Perl pages. WebDyne decides whether to run a requested file as a page by matching its name against WEBDYNE_PSP_EXT_RE, which has no end anchor. An application that accepts uploads by checking only the final extension lets a remote attacker upload a file such as report.psp.pdf and run its embedded Perl by requesting it.

Severity

No CVSS data available.

CWE

CWE-777 - Regular Expression without Anchors

Assigner

CPANSec CNA under the redhat root

CNA scorecard C 62/100 over 369 records in the last 180 days details

References

1 reference

URL	Tags
https://metacpan.org/release/ASPEER/WebDyne-3.022…	release-notes

Impacted products

1 product

Vendor	Product	Version
		Affected: 2.031 , < 3.022 (custom)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "WebDyne"
          ],
          "packageName": "WebDyne",
          "packageURL": "pkg:cpan/WebDyne",
          "programFiles": [
            "lib/WebDyne/Constant.pm",
            "lib/WebDyne/Request/PAGI.pm",
            "lib/WebDyne/Request/PSGI.pm"
          ],
          "repo": "https://github.com/aspeer/WebDyne",
          "versions": [
            {
              "lessThan": "3.022",
              "status": "affected",
              "version": "2.031",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "WebDyne versions from 2.031 before 3.022 for Perl execute files with .psp anywhere in the name as Perl pages.\n\nWebDyne decides whether to run a requested file as a page by matching its name against WEBDYNE_PSP_EXT_RE, which has no end anchor.\n\nAn application that accepts uploads by checking only the final extension lets a remote attacker upload a file such as report.psp.pdf and run its embedded Perl by requesting it."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-777",
              "description": "CWE-777 Regular Expression without Anchors",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-31T14:34:30.167Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/ASPEER/WebDyne-3.022/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to WebDyne 3.022 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "WebDyne versions from 2.031 before 3.022 for Perl execute files with .psp anywhere in the name as Perl pages",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-78191",
    "datePublished": "2026-10-31T14:34:30.167Z",
    "dateReserved": "2026-08-23T18:38:50.604Z",
    "dateUpdated": "2026-10-31T14:34:30.167Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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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

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