Vulnerability-Lookup

FKIE_CVE-2026-13576

Vulnerability from fkie_nvd - Published: 2026-10-30 13:18 - Updated: 2026-10-30 17:08

Severity

Summary

CallBackery versions before 0.62.0 for Perl store user passwords as unsalted HMAC-SHA1 hashes. Passwords are hashed with hmac_sha1_sum() from Mojo::Util with no key, a single fast SHA-1 HMAC. There is no salt, so equal passwords give equal hashes, and no work factor slows down guessing. An attacker who obtains the user table can recover passwords by fast offline guessing.

References

	URL	Tags
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://metacpan.org/release/OETIKER/CallBackery-0.62.0/changes

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "CallBackery"
          ],
          "packageName": "CallBackery",
          "packageURL": "pkg:cpan/CallBackery",
          "programFiles": [
            "lib/CallBackery/User.pm",
            "lib/CallBackery/GuiPlugin/UserForm.pm"
          ],
          "programRoutines": [
            {
              "name": "CallBackery::User::login"
            },
            {
              "name": "CallBackery::GuiPlugin::UserForm::actionCfg"
            }
          ],
          "repo": "https://github.com/oetiker/callbackery",
          "versions": [
            {
              "lessThan": "0.62.0",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "CallBackery versions before 0.62.0 for Perl store user passwords as unsalted HMAC-SHA1 hashes.\n\nPasswords are hashed with hmac_sha1_sum() from Mojo::Util with no key, a single fast SHA-1 HMAC. There is no salt, so equal passwords give equal hashes, and no work factor slows down guessing.\n\nAn attacker who obtains the user table can recover passwords by fast offline guessing."
    }
  ],
  "id": "CVE-2026-13576",
  "lastModified": "2026-10-30T17:08:54.633",
  "metrics": {},
  "published": "2026-10-30T13:18:32.900",
  "references": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "url": "https://metacpan.org/release/OETIKER/CallBackery-0.62.0/changes"
    }
  ],
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-759"
        },
        {
          "lang": "en",
          "value": "CWE-916"
        }
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "type": "Secondary"
    }
  ]
}

CVE-2026-13576 (GCVE-0-2026-13576)

Vulnerability from cvelistv5 – Published: 2026-10-30 13:09 – Updated: 2026-10-30 13:09

Title

CallBackery versions before 0.62.0 for Perl store user passwords as unsalted HMAC-SHA1 hashes

Summary

Severity

No CVSS data available.

CWE

CWE-916 - Use of Password Hash With Insufficient Computational Effort
CWE-759 - Use of a One-Way Hash without a Salt

Assigner

CPANSec CNA under the redhat root

CNA scorecard C 62/100 over 342 records in the last 180 days details

References

1 reference

URL	Tags
https://metacpan.org/release/OETIKER/CallBackery-…	release-notes

Impacted products

1 product

Vendor	Product	Version
		Affected: 0 , < 0.62.0 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "CallBackery"
          ],
          "packageName": "CallBackery",
          "packageURL": "pkg:cpan/CallBackery",
          "programFiles": [
            "lib/CallBackery/User.pm",
            "lib/CallBackery/GuiPlugin/UserForm.pm"
          ],
          "programRoutines": [
            {
              "name": "CallBackery::User::login"
            },
            {
              "name": "CallBackery::GuiPlugin::UserForm::actionCfg"
            }
          ],
          "repo": "https://github.com/oetiker/callbackery",
          "versions": [
            {
              "lessThan": "0.62.0",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "CallBackery versions before 0.62.0 for Perl store user passwords as unsalted HMAC-SHA1 hashes.\n\nPasswords are hashed with hmac_sha1_sum() from Mojo::Util with no key, a single fast SHA-1 HMAC. There is no salt, so equal passwords give equal hashes, and no work factor slows down guessing.\n\nAn attacker who obtains the user table can recover passwords by fast offline guessing."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-916",
              "description": "CWE-916 Use of Password Hash With Insufficient Computational Effort",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-759",
              "description": "CWE-759 Use of a One-Way Hash without a Salt",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T13:09:47.702Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/OETIKER/CallBackery-0.62.0/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to CallBackery 0.62.0 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "CallBackery versions before 0.62.0 for Perl store user passwords as unsalted HMAC-SHA1 hashes",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-13576",
    "datePublished": "2026-10-30T13:09:47.702Z",
    "dateReserved": "2026-06-28T20:49:43.680Z",
    "dateUpdated": "2026-10-30T13:09:47.702Z",
    "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.

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.

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