{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-72587 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-72587 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-72587 is a medium-severity vulnerability in CoreBunch Instatic, published on 10 Aug 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-2026-72587 and fix it if it is affected.\n\nWhat it is: CVE-2026-72587 is a medium-severity vulnerability in CoreBunch Instatic, published on 10 Aug 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-2026-72587 in the wild and no public exploit code.\n\nAffected product: CoreBunch Instatic. 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-2026-72587/ (Markdown: https://insights.sbomify.com/CVE-2026-72587/index.md)","id":"CVE-2026-72587","markdown":"https://insights.sbomify.com/CVE-2026-72587/index.md","name":"CVE-2026-72587","record":{"aliases":["GHSA-9p8f-ppfj-8gc5"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_modify","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Instatic caching library","requires_auth":"none","summary":"An unauthenticated attacker can poison the shared render cache via the server island endpoint, potentially serving malicious content to other users.","user_interaction":"required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"TuranSec","cpe":[],"cvss":{"score":6.1,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-444","name":"Inconsistent Interpretation of HTTP Requests"}],"description":"A cache poisoning vulnerability in CoreBunch/Instatic through 0.0.14 allows an unauthenticated remote attacker to poison the shared process-wide render cache by manipulating the u query parameter of the GET /_instatic/hole/\u003cnodeId\u003e server island endpoint.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Instatic - Cache Poisoning via Unauthenticated Server Island Endpoint","id":"CVE-2026-72587","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"other","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"bluewave-labs Checkmate - User Enumeration via Differential HTTP Response in Password Recovery","id":"CVE-2026-72588"},"packages":[],"prev":{"headline":"frangoteam FUXA - Missing Authentication on DAQ_QUERY Socket.IO Event Handler","id":"CVE-2026-72586"},"products":["Instatic"],"published":"2026-08-10","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":"2026-08-10","vendors":["CoreBunch"]},"summary":"An unauthenticated attacker can poison the shared render cache via the server island endpoint, potentially serving malicious content to other users.","url":"https://insights.sbomify.com/CVE-2026-72587/"}