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    4 vulnerabilities found for soupsieve by facelessuser

    CVE-2026-49477 (GCVE-0-2026-49477)

    Vulnerability from nvd – Published: 2026-07-14 20:51 – Updated: 2026-07-14 20:51
    VLAI
    Title
    Soup Sieve: Regular Expression Denial of Service (ReDoS) in soupsieve Selector Parser
    Summary
    Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 2.8.4, the CSS selector parser in soupsieve contains a regular expression vulnerable to catastrophic backtracking when processing an attribute selector with an unterminated quoted value in soupsieve/css_parser.py, allowing an attacker who can supply untrusted CSS selector strings to soupsieve.compile() or Beautiful Soup .select() / .select_one() to cause CPU exhaustion and denial of service. This issue is fixed in version 2.8.4.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    CWE
    • CWE-400 - Uncontrolled Resource Consumption
    • CWE-1333 - Inefficient Regular Expression Complexity
    Assigner
    References
    Impacted products
    Vendor Product Version
    facelessuser soupsieve Affected: < 2.8.4
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
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        {
          "product": "soupsieve",
          "vendor": "facelessuser",
          "versions": [
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              "version": "\u003c 2.8.4"
            }
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        }
      ],
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        {
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          "value": "Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 2.8.4, the CSS selector parser in soupsieve contains a regular expression vulnerable to catastrophic backtracking when processing an attribute selector with an unterminated quoted value in soupsieve/css_parser.py, allowing an attacker who can supply untrusted CSS selector strings to soupsieve.compile() or Beautiful Soup .select() / .select_one() to cause CPU exhaustion and denial of service. This issue is fixed in version 2.8.4."
        }
      ],
      "metrics": [
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
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            "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",
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          }
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        },
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          "descriptions": [
            {
              "cweId": "CWE-1333",
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        }
      ],
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      },
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        {
          "name": "https://github.com/facelessuser/soupsieve/security/advisories/GHSA-836r-79rf-4m37",
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          ],
          "url": "https://github.com/facelessuser/soupsieve/security/advisories/GHSA-836r-79rf-4m37"
        },
        {
          "name": "https://github.com/facelessuser/soupsieve/commit/eb4397618709186c109400448c6043b728217dc3",
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        },
        {
          "name": "https://github.com/facelessuser/soupsieve/releases/tag/2.8.4",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/facelessuser/soupsieve/releases/tag/2.8.4"
        }
      ],
      "source": {
        "advisory": "GHSA-836r-79rf-4m37",
        "discovery": "UNKNOWN"
      },
      "title": "Soup Sieve: Regular Expression Denial of Service (ReDoS) in soupsieve Selector Parser"
    }
  },
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    "dateReserved": "2026-05-30T04:17:43.095Z",
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    "state": "PUBLISHED"
  },
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}

    CVE-2026-49476 (GCVE-0-2026-49476)

    Vulnerability from nvd – Published: 2026-07-14 20:53 – Updated: 2026-07-15 14:27
    VLAI
    Title
    Soup Sieve: Memory Exhaustion via Large Comma-Separated Selector Lists in soupsieve
    Summary
    Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 2.8.4, the CSS selector parser in soupsieve allocates unbounded memory when compiling large comma-separated selector lists, allowing an attacker who can supply a crafted selector string to soupsieve.compile() or Beautiful Soup .select() / .select_one() to allocate hundreds of megabytes of heap memory from a relatively small input and cause denial of service. This issue is fixed in version 2.8.4.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-400 - Uncontrolled Resource Consumption
    • CWE-770 - Allocation of Resources Without Limits or Throttling
    Assigner
    References
    Impacted products
    Vendor Product Version
    facelessuser soupsieve Affected: < 2.8.4
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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        ],
        "title": "CISA ADP Vulnrichment"
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    ],
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        }
      ],
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      "title": "Soup Sieve: Memory Exhaustion via Large Comma-Separated Selector Lists in soupsieve"
    }
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    CVE-2026-49476 (GCVE-0-2026-49476)

    Vulnerability from cvelistv5 – Published: 2026-07-14 20:53 – Updated: 2026-07-15 14:27
    VLAI
    Title
    Soup Sieve: Memory Exhaustion via Large Comma-Separated Selector Lists in soupsieve
    Summary
    Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 2.8.4, the CSS selector parser in soupsieve allocates unbounded memory when compiling large comma-separated selector lists, allowing an attacker who can supply a crafted selector string to soupsieve.compile() or Beautiful Soup .select() / .select_one() to allocate hundreds of megabytes of heap memory from a relatively small input and cause denial of service. This issue is fixed in version 2.8.4.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-400 - Uncontrolled Resource Consumption
    • CWE-770 - Allocation of Resources Without Limits or Throttling
    Assigner
    References
    Impacted products
    Vendor Product Version
    facelessuser soupsieve Affected: < 2.8.4
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
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      "title": "Soup Sieve: Memory Exhaustion via Large Comma-Separated Selector Lists in soupsieve"
    }
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    CVE-2026-49477 (GCVE-0-2026-49477)

    Vulnerability from cvelistv5 – Published: 2026-07-14 20:51 – Updated: 2026-07-14 20:51
    VLAI
    Title
    Soup Sieve: Regular Expression Denial of Service (ReDoS) in soupsieve Selector Parser
    Summary
    Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 2.8.4, the CSS selector parser in soupsieve contains a regular expression vulnerable to catastrophic backtracking when processing an attribute selector with an unterminated quoted value in soupsieve/css_parser.py, allowing an attacker who can supply untrusted CSS selector strings to soupsieve.compile() or Beautiful Soup .select() / .select_one() to cause CPU exhaustion and denial of service. This issue is fixed in version 2.8.4.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    CWE
    • CWE-400 - Uncontrolled Resource Consumption
    • CWE-1333 - Inefficient Regular Expression Complexity
    Assigner
    References
    Impacted products
    Vendor Product Version
    facelessuser soupsieve Affected: < 2.8.4
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "soupsieve",
          "vendor": "facelessuser",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.8.4"
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        }
      ],
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        }
      ],
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            "baseScore": 7.5,
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          ],
          "url": "https://github.com/facelessuser/soupsieve/releases/tag/2.8.4"
        }
      ],
      "source": {
        "advisory": "GHSA-836r-79rf-4m37",
        "discovery": "UNKNOWN"
      },
      "title": "Soup Sieve: Regular Expression Denial of Service (ReDoS) in soupsieve Selector Parser"
    }
  },
  "cveMetadata": {
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  },
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