{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-66746 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-66746 is a medium-severity vulnerability in tomaka rouille, published on 28 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-66746 and fix it if it is affected.\n\nWhat it is: CVE-2026-66746 is a medium-severity vulnerability in tomaka rouille, published on 28 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-66746 exists.\n\nAffected product: tomaka rouille. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-66746/ (Markdown: https://insights.sbomify.com/CVE-2026-66746/index.md)","id":"CVE-2026-66746","markdown":"https://insights.sbomify.com/CVE-2026-66746/index.md","name":"CVE-2026-66746","record":{"aliases":["DEBIAN-CVE-2026-66746","GHSA-998j-f97v-vpgr"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Rust HTTP library","requires_auth":"none","summary":"Remote attackers can inject headers in Rouille library, enabling cache poisoning and security policy bypasses via response splitting.","user_interaction":"required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-113","name":"Improper Neutralization of CRLF Sequences in HTTP Headers"}],"description":"Rouille 0.4.0 through 3.6.2 contains an HTTP response splitting vulnerability that allows remote attackers to inject arbitrary response headers by embedding carriage return (0x0D) or line feed (0x0A) bytes into attacker-controlled input. Attackers can exploit percent-decoded query parameters reflected into response headers or inject bare LF characters into Cookie header values that are interpolated directly into Set-Cookie response headers, enabling cache poisoning, session fixation, and security header override attacks such as bypassing CSP or CORS policies.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-07-26","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-07-26T17:22:47Z","kind":"github_poc","ref":"https://github.com/theopaid/CVE-2026-66746-HTTP-Response-Splitting-via-Unvalidated-Response-Header-Values-rouille-","stars":0,"title":"Security Advisory: HTTP Response Splitting via Unvalidated Response Header Values (rouille)"}],"tier":"weaponised"},"has_fix":true,"headline":"Rouille 0.4.0 - 3.6.2 HTTP Response Splitting via Header Injection","id":"CVE-2026-66746","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"other","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"ENDLESSDOORS: Zbtlink Router rctl/kworker Phone-Home Root Implant","id":"CVE-2026-66747"},"packages":[],"prev":{"headline":"Artica Proxy 4.50 Session Fixation via fw.login.php","id":"CVE-2026-66745"},"products":["rouille"],"published":"2026-07-28","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-29","vendors":["tomaka"]},"summary":"Remote attackers can inject headers in Rouille library, enabling cache poisoning and security policy bypasses via response splitting.","url":"https://insights.sbomify.com/CVE-2026-66746/"}