{"answers":{"affected":"1 open source package ship an affected version, including soupsieve.","exploited":"There is no known exploitation of CVE-2026-126190 in the wild and no public exploit code.","exposure":"An affected version is only exploitable if your software calls select() or select_one(). Many projects that include it are not exposed.","fix":"Upgrade soupsieve to 4.0.0 or later.","what":"CVE-2026-126190 is a high-severity denial of service vulnerability in facelessuser soupsieve, published on 12 Nov 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-126190 and fix it if it is affected.\n\nWhat it is: CVE-2026-126190 is a high-severity denial of service vulnerability in facelessuser soupsieve, published on 12 Nov 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-126190 in the wild and no public exploit code.\nExposure: An affected version is only exploitable if your software calls select() or select_one(). Many projects that include it are not exposed.\n\nAffected packages and fixed versions:\n- soupsieve (PyPI): affected all versions; fixed in 4.0.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n   If an affected version is present, also search the code for calls to select() or select_one() and report whether any exist.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-126190/ (Markdown: https://insights.sbomify.com/CVE-2026-126190/index.md)","id":"CVE-2026-126190","markdown":"https://insights.sbomify.com/CVE-2026-126190/index.md","name":"CVE-2026-126190","record":{"aliases":["GHSA-mmhr-3c5m-f64f"],"analysis":{"component_type":"library","exploitable_when_present":false,"fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Python CSS selector library","requires_auth":"none","requires_specific_call":true,"summary":"Deeply nested attacker-influenced HTML or XML can make selector matching consume excessive CPU in applications using Soup Sieve on untrusted documents.","user_interaction":"not_required","vuln_class":"denial_of_service","vulnerable_functions":["select()","select_one()"]},"analysis_generated_by":"sbomify/insights-2b-fp8","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-407","name":"Inefficient Algorithmic Complexity"}],"description":"Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 4.0, Soup Sieve repeatedly walks the same ancestors while matching descendant combinators, and each additional descendant combinator raises the polynomial degree of the work on deeply nested attacker-influenced HTML or XML. Applications using selectors such as section div div through select(), select_one(), or Beautiful Soup CSS APIs against untrusted documents can have a worker occupied for seconds or minutes, while trusted-only document processing is not affected. Selectors compiled with NOCACHE continue to use the old uncached behavior. This issue is fixed in version 4.0.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Soup Sieve: Polynomial-time denial of service in the descendant combinator","id":"CVE-2026-126190","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":1,"n_references":4,"next":{"headline":"Soup Sieve: Exponential ReDoS in selector compilation via \\9-run in CSS_ESCAPES/IDENTIFIER","id":"CVE-2026-126191"},"nickname":null,"packages":[{"ecosystem":"PyPI","fixed":["4.0.0"],"introduced":["0"],"last_affected":[],"package":"soupsieve","purl":null,"source":"GHSA-mmhr-3c5m-f64f"}],"prev":{"headline":"Soup Sieve: Quadratic-time denial of service when matching `:has()`","id":"CVE-2026-126189"},"products":["soupsieve"],"published":"2026-11-12","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-11-12","vendors":["facelessuser"]},"summary":"Deeply nested attacker-influenced HTML or XML can make selector matching consume excessive CPU in applications using Soup Sieve on untrusted documents.","url":"https://insights.sbomify.com/CVE-2026-126190/"}