{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-91859 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-91859 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-91859 is a medium-severity vulnerability in MISP, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-91859 and fix it if it is affected.\n\nWhat it is: CVE-2026-91859 is a medium-severity vulnerability in MISP, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-91859 in the wild and no public exploit code.\n\nAffected product: MISP. 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-2026-91859/ (Markdown: https://insights.sbomify.com/CVE-2026-91859/index.md)","id":"CVE-2026-91859","markdown":"https://insights.sbomify.com/CVE-2026-91859/index.md","name":"CVE-2026-91859","record":{"aliases":["GHSA-qx5f-75hg-mf2c"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"MISP threat sharing","requires_auth":"low_privilege","summary":"Attackers can corrupt MISP access logs by triggering exceptions, causing incorrect metrics to overwrite valid entries, impacting audit integrity.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"CIRCL","cpe":[],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-778","name":"Insufficient Logging"},{"id":"CWE-223","name":"Omission of Security-relevant Information"}],"description":"Affected versions of MISP can record incorrect access-log data for requests that terminate in an exception.\n\nBecause CakeErrorController extends AppController, exception rendering runs the application startup path a second time. As a result, __accessMonitor() calls AccessLog::logRequest() twice for one HTTP request. The second deferred writer measures the error-controller execution instead of the original request and can overwrite the row created by the first pass. The corrupted fields include request duration, SQL query count, memory usage, and potentially the recorded query log.\n\nThe bug was masked because the same model instance retained the ID of the first saved row, causing the later save to issue an UPDATE rather than insert an obvious duplicate row.\n\nVersion affected: ≤2.5.45","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":"MISP Access Log Entry Overwritten by Error Controller's Second beforeFilter Pass","id":"CVE-2026-91859","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"information_disclosure","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Prototype Pollution in Vaadin Charts and Component Base via Unfiltered Deep Merge","id":"CVE-2026-91860"},"packages":[],"prev":{"headline":"FopProducer transforms the incoming XSL-FO message body by creating a javax.xml.transform.TransformerFactory through TransformerFactory.newI","id":"CVE-2026-91858"},"products":["MISP"],"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-15","vendors":["MISP"]},"summary":"Attackers can corrupt MISP access logs by triggering exceptions, causing incorrect metrics to overwrite valid entries, impacting audit integrity.","url":"https://insights.sbomify.com/CVE-2026-91859/"}