Vulnerability-Lookup

OESA-2026-3159 (CVE-2026-14803)

Vulnerability from osv_openeuler – Published: 2026-07-24 11:12 – Updated: 2026-08-06 11:12 – Source website

Summary

perl-Mojolicious security update

Details

Back in the early days of the web there was this wonderful Perl library called CGI, many people only learned Perl because of it. It was simple enough to get started without knowing much about the language and powerful enough to keep you going, learning by doing was much fun. While most of the techniques used are outdated now, the idea behind it is not. Mojolicious is a new attempt at implementing this idea using state of the art technology.

Security Fix(es):

Mojo::JSON versions before 9.47 for Perl allow memory exhaustion via unbounded recursion in the pure-Perl decoder.

The pure-Perl decode path (_decode_value dispatching to _decode_array and _decode_object) recurses with no depth limit, so a small deeply nested JSON document can consume excessive memory.

This path is the default when Cpanel::JSON::XS is not installed or MOJO_NO_JSON_XS=1 is set; the Cpanel::JSON::XS fast path is not affected.

Any caller that decodes an untrusted JSON body, for example Mojo::Message::json reached through $c->req->json, can exhaust process memory and cause denial of service.(CVE-2026-14803)

Severity

6.5 (Medium)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-14803	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "noarch": [
          "perl-Mojolicious-9.26-2.oe2203sp4.noarch.rpm",
          "perl-Mojolicious-help-9.26-2.oe2203sp4.noarch.rpm",
          "perl-Test-Mojo-9.26-2.oe2203sp4.noarch.rpm"
        ],
        "src": [
          "perl-Mojolicious-9.26-2.oe2203sp4.src.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "perl-Mojolicious",
        "purl": "pkg:rpm/openEuler/perl-Mojolicious\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.26-2.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "noarch": [
          "perl-Mojolicious-9.33-2.oe2403sp1.noarch.rpm",
          "perl-Mojolicious-help-9.33-2.oe2403sp1.noarch.rpm",
          "perl-Test-Mojo-9.33-2.oe2403sp1.noarch.rpm"
        ],
        "src": [
          "perl-Mojolicious-9.33-2.oe2403sp1.src.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "perl-Mojolicious",
        "purl": "pkg:rpm/openEuler/perl-Mojolicious\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.33-2.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "noarch": [
          "perl-Mojolicious-9.33-2.oe2403sp3.noarch.rpm",
          "perl-Mojolicious-help-9.33-2.oe2403sp3.noarch.rpm",
          "perl-Test-Mojo-9.33-2.oe2403sp3.noarch.rpm"
        ],
        "src": [
          "perl-Mojolicious-9.33-2.oe2403sp3.src.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP3",
        "name": "perl-Mojolicious",
        "purl": "pkg:rpm/openEuler/perl-Mojolicious\u0026distro=openEuler-24.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.33-2.oe2403sp3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "noarch": [
          "perl-Mojolicious-9.33-2.oe2403sp4.noarch.rpm",
          "perl-Mojolicious-help-9.33-2.oe2403sp4.noarch.rpm",
          "perl-Test-Mojo-9.33-2.oe2403sp4.noarch.rpm"
        ],
        "src": [
          "perl-Mojolicious-9.33-2.oe2403sp4.src.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP4",
        "name": "perl-Mojolicious",
        "purl": "pkg:rpm/openEuler/perl-Mojolicious\u0026distro=openEuler-24.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.33-2.oe2403sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "noarch": [
          "perl-Mojolicious-9.26-2.oe2003sp4.noarch.rpm",
          "perl-Mojolicious-help-9.26-2.oe2003sp4.noarch.rpm",
          "perl-Test-Mojo-9.26-2.oe2003sp4.noarch.rpm"
        ],
        "src": [
          "perl-Mojolicious-9.26-2.oe2003sp4.src.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "perl-Mojolicious",
        "purl": "pkg:rpm/openEuler/perl-Mojolicious\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.26-2.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "Back in the early days of the web there was this wonderful Perl library called CGI, many people only learned Perl because of it. It was simple enough to get started without knowing much about the language and powerful enough to keep you going, learning by doing was much fun. While most of the techniques used are outdated now, the idea behind it is not. Mojolicious is a new attempt at implementing this idea using state of the art technology.\r\n\r\nSecurity Fix(es):\n\nMojo::JSON versions before 9.47 for Perl allow memory exhaustion via unbounded recursion in the pure-Perl decoder.\n\nThe pure-Perl decode path (`_decode_value` dispatching to `_decode_array` and `_decode_object`) recurses with no depth limit, so a small deeply nested JSON document can consume excessive memory.\n\nThis path is the default when Cpanel::JSON::XS is not installed or `MOJO_NO_JSON_XS=1` is set; the Cpanel::JSON::XS fast path is not affected.\n\nAny caller that decodes an untrusted JSON body, for example `Mojo::Message::json` reached through `$c-\u0026gt;req-\u0026gt;json`, can exhaust process memory and cause denial of service.(CVE-2026-14803)",
  "id": "OESA-2026-3159",
  "modified": "2026-08-06T11:12:02Z",
  "published": "2026-07-24T11:12:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3159"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-14803"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "perl-Mojolicious security update",
  "upstream": [
    "CVE-2026-14803"
  ]
}

CVE-2026-14803 (GCVE-0-2026-14803)

Vulnerability from cvelistv5 – Published: 2026-07-06 01:34 – Updated: 2026-07-06 18:51

Title

Mojo::JSON versions before 9.47 for Perl allow memory exhaustion via unbounded recursion in the pure-Perl decoder

Summary

Mojo::JSON versions before 9.47 for Perl allow memory exhaustion via unbounded recursion in the pure-Perl decoder. The pure-Perl decode path (`_decode_value` dispatching to `_decode_array` and `_decode_object`) recurses with no depth limit, so a small deeply nested JSON document can consume excessive memory. This path is the default when Cpanel::JSON::XS is not installed or `MOJO_NO_JSON_XS=1` is set; the Cpanel::JSON::XS fast path is not affected. Any caller that decodes an untrusted JSON body, for example `Mojo::Message::json` reached through `$c->req->json`, can exhaust process memory and cause denial of service.

Severity

6.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-06 18:50 UTC

CWE

CWE-674 - Uncontrolled Recursion

Assigner

CPANSec redhat root

References

3 references

URL	Tags
https://github.com/mojolicious/mojo/commit/cc38b0…	patch
https://metacpan.org/release/SRI/Mojolicious-9.47…	release-notes
http://www.openwall.com/lists/oss-security/2026/07/06/2

Impacted products

1 product

Vendor	Product	Version
SRI	Mojo::JSON	Affected: 0 , < 9.47 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-07-06T05:27:01.702Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/07/06/2"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 6.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-14803",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-06T18:50:20.863135Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-06T18:51:14.358Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Mojolicious",
          "product": "Mojo::JSON",
          "programFiles": [
            "lib/Mojo/JSON.pm"
          ],
          "programRoutines": [
            {
              "name": "Mojo::JSON::_decode_array"
            },
            {
              "name": "Mojo::JSON::_decode_object"
            }
          ],
          "repo": "https://github.com/mojolicious/mojo",
          "vendor": "SRI",
          "versions": [
            {
              "lessThan": "9.47",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Mojo::JSON versions before 9.47 for Perl allow memory exhaustion via unbounded recursion in the pure-Perl decoder.\n\nThe pure-Perl decode path (`_decode_value` dispatching to `_decode_array` and `_decode_object`) recurses with no depth limit, so a small deeply nested JSON document can consume excessive memory.\n\nThis path is the default when Cpanel::JSON::XS is not installed or `MOJO_NO_JSON_XS=1` is set; the Cpanel::JSON::XS fast path is not affected.\n\nAny caller that decodes an untrusted JSON body, for example `Mojo::Message::json` reached through `$c-\u003ereq-\u003ejson`, can exhaust process memory and cause denial of service."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-674",
              "description": "CWE-674 Uncontrolled Recursion",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-06T01:34:43.872Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/mojolicious/mojo/commit/cc38b0554275c4d84f6b8b49bcbbc1bec2068fe1.patch"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/SRI/Mojolicious-9.47/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to Mojolicious 9.47 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2026-07-05T00:00:00.000Z",
          "value": "Version 9.47 released with fix."
        }
      ],
      "title": "Mojo::JSON versions before 9.47 for Perl allow memory exhaustion via unbounded recursion in the pure-Perl decoder",
      "workarounds": [
        {
          "lang": "en",
          "value": "Where upgrading is not possible, install Cpanel::JSON::XS in the include path and leave `MOJO_NO_JSON_XS` unset."
        }
      ],
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-14803",
    "datePublished": "2026-07-06T01:34:43.872Z",
    "dateReserved": "2026-07-05T21:23:29.979Z",
    "dateUpdated": "2026-07-06T18:51:14.358Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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 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.
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Action not permitted

OESA-2026-3159 (CVE-2026-14803)

CVE-2026-14803 (GCVE-0-2026-14803)

Tags

Sightings

Nomenclature

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