{"answers":{"affected":"2 open source packages ship an affected version, including cyberchef.","exploited":"There is no known exploitation of CVE-2026-42615 in the wild and no public exploit code.","fix":"Upgrade cyberchef to 11.0.0 or later.","what":"CVE-2026-42615 is a high-severity cross-site scripting vulnerability in GCHQ CyberChef, published on 29 Apr 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-2026-42615 and fix it if it is affected.\n\nWhat it is: CVE-2026-42615 is a high-severity cross-site scripting vulnerability in GCHQ CyberChef, published on 29 Apr 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-2026-42615 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- cyberchef (npm): affected all versions; fixed in 11.0.0\n- cyberchef (npm): affected all versions; fixed in 11.0.0\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-2026-42615/ (Markdown: https://insights.sbomify.com/CVE-2026-42615/index.md)","id":"CVE-2026-42615","markdown":"https://insights.sbomify.com/CVE-2026-42615/index.md","name":"CVE-2026-42615","record":{"aliases":["GHSA-h4hv-92pp-pcjg"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"CyberChef web tool","requires_auth":"none","summary":"An attacker can execute arbitrary scripts in the victim's browser via the Show Base64 offsets feature in CyberChef.","user_interaction":"not_required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[],"cvss":{"score":7.2,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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":"GCHQ CyberChef before 11.0.0 allows XSS via Show Base64 offsets, as demonstrated by the /#recipe=Show_Base64_offsets('%3Cscript substring.","ecosystems":["npm"],"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":"CyberChef has a Cross-site Scripting issue","id":"CVE-2026-42615","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":4,"next":{"headline":"Memory corruption in n/a","id":"CVE-2026-42616"},"packages":[{"ecosystem":"npm","fixed":["11.0.0"],"introduced":["0"],"last_affected":[],"package":"cyberchef","purl":null,"source":"GHSA-h4hv-92pp-pcjg"},{"ecosystem":"npm","fixed":["11.0.0"],"introduced":["0"],"last_affected":[],"package":"cyberchef","purl":"pkg:npm/cyberchef","source":"GHSA-h4hv-92pp-pcjg"}],"prev":{"headline":"Grav: Privilege Escalation via Missing Server-Side Validation of groups/access","id":"CVE-2026-42613"},"products":["CyberChef"],"published":"2026-04-29","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-29","vendors":["GCHQ"]},"summary":"An attacker can execute arbitrary scripts in the victim's browser via the Show Base64 offsets feature in CyberChef.","url":"https://insights.sbomify.com/CVE-2026-42615/"}