FKIE_CVE-2026-31899

Vulnerability from fkie_nvd - Published: 2026-03-13 19:54 - Updated: 2026-06-17 10:34
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
CairoSVG is an SVG converter based on Cairo, a 2D graphics library. Prior to Kozea/CairoSVG has exponential denial of service via recursive <use> element amplification in cairosvg/defs.py. This causes CPU exhaustion from a small input.
References
security-advisories@github.comhttps://github.com/Kozea/CairoSVG/commit/6dde8685ed3f19837767bce7a13a5491e3d0e0bfPatch
security-advisories@github.comhttps://github.com/Kozea/CairoSVG/security/advisories/GHSA-f38f-5xpm-9r7cExploit, Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
courtbouillon cairosvg *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "CairoSVG",
          "vendor": "Kozea",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.9.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:courtbouillon:cairosvg:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "901094B9-8320-4ACD-BE63-925FC6B199E1",
              "versionEndExcluding": "2.9.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "CairoSVG is an SVG converter based on Cairo, a 2D graphics library. Prior to Kozea/CairoSVG has exponential denial of service via recursive \u003cuse\u003e element amplification in cairosvg/defs.py. This causes CPU exhaustion from a small input."
    },
    {
      "lang": "es",
      "value": "CairoSVG es un conversor de SVG basado en Cairo, una librer\u00edade gr\u00e1ficos 2D. Anteriormente, Kozea/CairoSVG ten\u00eda una denegaci\u00f3n de servicio exponencial a trav\u00e9s de la amplificaci\u00f3n recursiva del elemento  en cairosvg/defs.py. Esto causa el agotamiento de la CPU a partir de una entrada peque\u00f1a."
    }
  ],
  "id": "CVE-2026-31899",
  "lastModified": "2026-06-17T10:34:43.337",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-31899",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-16T13:37:56.879562Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-13T19:54:38.190",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/Kozea/CairoSVG/commit/6dde8685ed3f19837767bce7a13a5491e3d0e0bf"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/Kozea/CairoSVG/security/advisories/GHSA-f38f-5xpm-9r7c"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-674"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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.