{"answers":{"affected":"2 open source packages ship an affected version, including mistune.","exploited":"There is no known exploitation of CVE-2026-115355 in the wild and no public exploit code.","fix":"Upgrade mistune to 3.3.0 or later.","what":"CVE-2026-115355 is a high-severity vulnerability in lepture mistune, published on 22 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-115355 and fix it if it is affected.\n\nWhat it is: CVE-2026-115355 is a high-severity vulnerability in lepture mistune, published on 22 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-115355 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- mistune (PyPI): affected all versions; fixed in 3.3.0\n- mistune (PyPI): affected all versions; fixed in 3.3.0\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-2026-115355/ (Markdown: https://insights.sbomify.com/CVE-2026-115355/index.md)","id":"CVE-2026-115355","markdown":"https://insights.sbomify.com/CVE-2026-115355/index.md","name":"CVE-2026-115355","record":{"aliases":["DEBIAN-CVE-2026-115355","ECHO-fbfa-3d9a-c5b2","GHSA-h7ww-273w-6cm8","UBUNTU-CVE-2026-115355"],"analysis":null,"analysis_generated_by":null,"assigner":"VulnCheck","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"Mistune before 3.3.0 contains a path traversal vulnerability in the Include directive that allows attackers to read arbitrary files by supplying ../ sequences in include paths. Attackers can also inject HTML through unescaped error messages and included file contents to perform cross-site scripting even when escape=True is set.","ecosystems":["PyPI"],"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":"Mistune before 3.3.0 Path Traversal and XSS via Include Directive","id":"CVE-2026-115355","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":null,"year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"OpenBao before 2.6.4 and 2.7.0 before 2.7.1 Kubernetes Auth Method Token Renewal After Revocation","id":"CVE-2026-115356"},"packages":[{"ecosystem":"PyPI","fixed":["3.3.0"],"introduced":["0"],"last_affected":[],"package":"mistune","purl":null,"source":"GHSA-h7ww-273w-6cm8"},{"ecosystem":"PyPI","fixed":["3.3.0"],"introduced":["0"],"last_affected":[],"package":"mistune","purl":"pkg:pypi/mistune","source":"GHSA-h7ww-273w-6cm8"}],"prev":{"headline":"Mistune before 3.3.0 Arbitrary Local File Read via Include Directive","id":"CVE-2026-115354"},"products":["mistune"],"published":"2026-10-22","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"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":"partial"},"state":"PUBLISHED","updated":"2026-10-29","vendors":["lepture"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-115355/"}