CVE-2026-92822

Full vulnerability record from the local CVENow database.
Description

A flaw was found in libmodulemd. When parsing module metadata, the xmd field is converted into nested GVariant values through recursive YAML mapping and sequence helpers without a recursion-depth or node-count limit. An attacker who can supply crafted modulemd YAML with deeply nested xmd content can cause stack exhaustion or excessive resource consumption, resulting in a denial of service.
Severity
MEDIUM
CVSS score
6.2 (v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
[email protected]
Published
2026-10-21 04:18:11.980000
Last modified
2026-11-06 08:17:38.540000
View original CVE JSON
{
  "id": "CVE-2026-92822",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-21T04:18:11.980",
  "lastModified": "2026-11-06T08:17:38.540",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in libmodulemd. When parsing module metadata, the xmd field is converted into nested GVariant values through recursive YAML mapping and sequence helpers without a recursion-depth or node-count limit. An attacker who can supply crafted modulemd YAML with deeply nested xmd content can cause stack exhaustion or excessive resource consumption, resulting in a denial of service."
    }
  ],
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          "packageName": "libmodulemd",
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          "packageName": "libmodulemd",
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          "packageName": "libmodulemd",
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  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 6.2,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-10-21T20:42:42.905112Z",
          "id": "CVE-2026-92822",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-674"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://access.redhat.com/security/cve/CVE-2026-92822",
      "source": "[email protected]"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479002",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/advisories/GHSA-85r9-7wj5-x6x5",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/fedora-modularity/libmodulemd/pull/645",
      "source": "[email protected]"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479002",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}