{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-76579 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-76579 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-76579 is a medium-severity cross-site scripting vulnerability in litespeedtech LiteSpeed Cache, published on 19 Sep 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-2026-76579 and fix it if it is affected.\n\nWhat it is: CVE-2026-76579 is a medium-severity cross-site scripting vulnerability in litespeedtech LiteSpeed Cache, published on 19 Sep 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: There is no known exploitation of CVE-2026-76579 in the wild and no public exploit code.\n\nAffected product: litespeedtech LiteSpeed Cache. 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-2026-76579/ (Markdown: https://insights.sbomify.com/CVE-2026-76579/index.md)","id":"CVE-2026-76579","markdown":"https://insights.sbomify.com/CVE-2026-76579/index.md","name":"CVE-2026-76579","record":{"aliases":["GHSA-jf4h-cq6m-xhwf"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"WordPress plugin","requires_auth":"none","summary":"Unauthenticated attackers can inject arbitrary scripts via the ESI parameter in LiteSpeed Cache, executing code in victim browsers.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Wordfence","cpe":[],"cvss":{"score":4.7,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"The LiteSpeed Cache plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'esi' parameter in all versions up to, and including, 7.9 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. Exploitation requires that the attacker supply a validly signed 'esi' value in the GET query string while submitting a separate attacker-controlled 'esi' payload as a POST body field, relying on PHP's default $_REQUEST merge order to have the POST value take precedence at the point of execution.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"LiteSpeed Cache \u003c= 7.9 - Reflected Cross-Site Scripting via ESI 'esi' Parameter","id":"CVE-2026-76579","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":7,"next":{"headline":"WPMU DEV Dashboard \u003c= 5.0.1 - Authentication Bypass to Administrator via SSO HMAC Canonicalization Confusion","id":"CVE-2026-76581"},"packages":[],"prev":{"headline":"Ipa: freeipa: freeipa: unauthenticated ldap client can obtain administrator credentials via the self-managed-token aci","id":"CVE-2026-76578"},"products":["LiteSpeed Cache"],"published":"2026-09-19","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-19","vendors":["litespeedtech"]},"summary":"Unauthenticated attackers can inject arbitrary scripts via the ESI parameter in LiteSpeed Cache, executing code in victim browsers.","url":"https://insights.sbomify.com/CVE-2026-76579/"}