{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-19773 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-19773 is a critical memory corruption vulnerability in libwebsockets, published on 15 Sep 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-2026-19773 and fix it if it is affected.\n\nWhat it is: CVE-2026-19773 is a critical memory corruption vulnerability in libwebsockets, published on 15 Sep 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-2026-19773 in the wild and no public exploit code.\n\nAffected product: libwebsockets. 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-2026-19773/ (Markdown: https://insights.sbomify.com/CVE-2026-19773/index.md)","id":"CVE-2026-19773","markdown":"https://insights.sbomify.com/CVE-2026-19773/index.md","name":"CVE-2026-19773","record":{"aliases":["DEBIAN-CVE-2026-19773","GHSA-r4m8-276f-3r2f","UBUNTU-CVE-2026-19773","USN-8893-1"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"libwebsockets library","requires_auth":"none","summary":"Remote attackers can execute arbitrary code via an out-of-bounds write in libwebsockets HTTP/2 HPACK path header parsing without authentication.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"zdi","cpe":[],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.0"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"libwebsockets HTTP/2 HPACK Path Header Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of libwebsockets. Authentication is not required to exploit this vulnerability.\n\nThe specific flaw exists within the parsing of HTTP/2 HPACK path header. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-31036.","ecosystems":[],"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":"libwebsockets HTTP/2 HPACK Path Header Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability","id":"CVE-2026-19773","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"BlueZ A2DP Stack-based Buffer Overflow Remote Code Execution Vulnerability","id":"CVE-2026-19774"},"packages":[],"prev":{"headline":"Baicells EG3661M LuCI Web luci os command injection","id":"CVE-2026-19771"},"products":["libwebsockets"],"published":"2026-09-15","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)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-16","vendors":["libwebsockets"]},"summary":"Remote attackers can execute arbitrary code via an out-of-bounds write in libwebsockets HTTP/2 HPACK path header parsing without authentication.","url":"https://insights.sbomify.com/CVE-2026-19773/"}