{"answers":{"affected":"1 open source package ship an affected version, including html_sanitize_ex. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-68749 in the wild and no public exploit code.","fix":"Upgrade html_sanitize_ex to a fixed version for your release line: 1.4.5 or 1.5.3.","what":"CVE-2026-68749 is a high-severity denial of service vulnerability in rrrene html_sanitize_ex, published on 6 Aug 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-2026-68749 and fix it if it is affected.\n\nWhat it is: CVE-2026-68749 is a high-severity denial of service vulnerability in rrrene html_sanitize_ex, published on 6 Aug 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-2026-68749 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- html_sanitize_ex (Hex): affected from 0.3.1; fixed in 1.4.5, 1.5.3\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.\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-2026-68749/ (Markdown: https://insights.sbomify.com/CVE-2026-68749/index.md)","id":"CVE-2026-68749","markdown":"https://insights.sbomify.com/CVE-2026-68749/index.md","name":"CVE-2026-68749","record":{"aliases":["EEF-CVE-2026-68749","GHSA-4cx2-987x-rr2x","GHSA-8rjf-8hw9-j63g"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Elixir HTML sanitizer","requires_auth":"none","summary":"An unauthenticated attacker can cause CPU exhaustion and application unresponsiveness by submitting long CSS declarations to the html_sanitize_ex library.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"EEF","cpe":[{"product":"htmlsanitizeex","vendor":"rrrene"}],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-1333","name":"Inefficient Regular Expression Complexity"}],"description":"Inefficient Regular Expression Complexity vulnerability in the CSS scrubber in rrrene html_sanitize_ex allows an unauthenticated remote attacker to exhaust server CPU via a long CSS declaration in sanitized HTML. The declaration regex in HtmlSanitizeEx.Scrubber.CSS.scrub/1 matches the property name with an unbounded greedy [-\\w]+ followed by a mandatory :, so a long run of word characters not followed by a colon makes the engine give back one character at a time and retry the colon at every start offset. The work is quadratic in the length of the run, and no length cap is applied to the CSS handed to the scrubber. An 80 KB \u003cstyle\u003e body costs roughly 2.4 seconds of scheduler time, so a few concurrent requests saturate the BEAM scheduler pool and make the application unresponsive.\n\nThe impact is CPU exhaustion only. Nothing is read, modified or disclosed.\n\nThis issue affects html_sanitize_ex: from 0.3.1 before 1.4.5 and from 1.5.0-rc.0 before 1.5.3.","ecosystems":["Hex"],"exploits":{"exploitdb":0,"first_seen":"2026-08-13","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-08-13T10:03:05Z","kind":"github_poc","ref":"https://github.com/Hunt-Benito/the-sanitizer-is-the-weapon-cve-2026-68749-cve-2026-68750-quadratic-dos-in-elixir-html-sanitize-ex","stars":0,"title":null}],"tier":"poc_unverified"},"has_fix":true,"headline":"Quadratic regex backtracking in the html_sanitize_ex CSS scrubber allows CPU-exhaustion denial of service","id":"CVE-2026-68749","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Hex","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":1,"n_references":5,"next":{"headline":"Quadratic sibling re-flattening in the html_sanitize_ex traversal engine allows CPU-exhaustion denial of service","id":"CVE-2026-68750"},"packages":[{"ecosystem":"Hex","fixed":["1.4.5","1.5.3"],"introduced":["0.3.1","1.5.0-rc.0"],"last_affected":[],"package":"html_sanitize_ex","purl":"pkg:hex/html_sanitize_ex","source":"EEF-CVE-2026-68749"}],"prev":{"headline":"CSS sanitizer allowlist bypass in html_sanitize_ex via non-declaration input","id":"CVE-2026-68747"},"products":["html_sanitize_ex"],"published":"2026-08-06","related":[{"cvss_score":8.2,"headline":"Quadratic sibling re-flattening in the html_sanitize_ex traversal engine allows CPU-exhaustion denial of service","id":"CVE-2026-68750","kev_date_added":null,"published":"2026-08-06"},{"cvss_score":4.8,"headline":"html_sanitize_ex HTML5 scrubber keeps attacker-supplied form-association attributes, allowing form hijacking","id":"CVE-2026-66370","kev_date_added":null,"published":"2026-08-06"},{"cvss_score":2.3,"headline":"html_sanitize_ex HTML5 scrubber keeps attacker-supplied meta refresh, allowing forced cross-origin redirection","id":"CVE-2026-66829","kev_date_added":null,"published":"2026-08-06"},{"cvss_score":2.3,"headline":"html_sanitize_ex HTML5 scrubber keeps attacker-supplied `\u003cobject\u003e` elements, allowing untrusted content embedding","id":"CVE-2026-66843","kev_date_added":null,"published":"2026-08-06"},{"cvss_score":2.3,"headline":"CSS sanitizer allowlist bypass in html_sanitize_ex via non-declaration input","id":"CVE-2026-68747","kev_date_added":null,"published":"2026-08-06"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Erlang Ecosystem Foundation","prefix":"EEF"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-19","vendors":["rrrene"]},"summary":"An unauthenticated attacker can cause CPU exhaustion and application unresponsiveness by submitting long CSS declarations to the html_sanitize_ex library.","url":"https://insights.sbomify.com/CVE-2026-68749/"}