{"answers":{"affected":"8 open source packages ship an affected version, including electron. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-34776 in the wild and no public exploit code.","fix":"Upgrade electron to a fixed version for your release line: 38.8.6, 39.8.1, 40.8.1 or 41.0.0.","what":"CVE-2026-34776 is a medium-severity vulnerability in Electronjs Electron, published on 3 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-34776 and fix it if it is affected.\n\nWhat it is: CVE-2026-34776 is a medium-severity vulnerability in Electronjs Electron, published on 3 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-34776 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- electron (npm): affected all versions; fixed in 38.8.6\n- electron (npm): affected all versions; fixed in 38.8.6\n- electron (npm): affected from 39.0.0-alpha.1; fixed in 39.8.1\n- electron (npm): affected from 39.0.0-alpha.1; fixed in 39.8.1\n- electron (npm): affected from 40.0.0-alpha.1; fixed in 40.8.1\n- electron (npm): affected from 40.0.0-alpha.1; fixed in 40.8.1\n- electron (npm): affected from 41.0.0-alpha.1; fixed in 41.0.0\n- electron (npm): affected from 41.0.0-alpha.1; fixed in 41.0.0\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-2026-34776/ (Markdown: https://insights.sbomify.com/CVE-2026-34776/index.md)","id":"CVE-2026-34776","markdown":"https://insights.sbomify.com/CVE-2026-34776/index.md","name":"CVE-2026-34776","record":{"aliases":["GHSA-3c8v-cfp5-9885"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Electron framework","requires_auth":"low_privilege","summary":"An out-of-bounds read in Electron's second-instance IPC allows local attackers to leak memory to the application's event handler.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"electron","vendor":"electronjs"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0, on macOS and Linux, apps that call app.requestSingleInstanceLock() were vulnerable to an out-of-bounds heap read when parsing a crafted second-instance message. Leaked memory could be delivered to the app's second-instance event handler. This issue is limited to processes running as the same user as the Electron app. Apps that do not call app.requestSingleInstanceLock() are not affected. Windows is not affected by this issue. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0.","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":"Electron: Out-of-bounds read in second-instance IPC on macOS and Linux","id":"CVE-2026-34776","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":"electronjs:electron","products":["electronjs:electron"],"type":"information_disclosure","year":"2026"},"n_packages":8,"n_references":1,"next":{"headline":"Electron: Incorrect origin passed to permission request handler for iframe requests","id":"CVE-2026-34777"},"packages":[{"ecosystem":"npm","fixed":["38.8.6"],"introduced":["0"],"last_affected":[],"package":"electron","purl":null,"source":"GHSA-3c8v-cfp5-9885"},{"ecosystem":"npm","fixed":["38.8.6"],"introduced":["0"],"last_affected":[],"package":"electron","purl":"pkg:npm/electron","source":"GHSA-3c8v-cfp5-9885"},{"ecosystem":"npm","fixed":["39.8.1"],"introduced":["39.0.0-alpha.1"],"last_affected":[],"package":"electron","purl":null,"source":"GHSA-3c8v-cfp5-9885"},{"ecosystem":"npm","fixed":["39.8.1"],"introduced":["39.0.0-alpha.1"],"last_affected":[],"package":"electron","purl":"pkg:npm/electron","source":"GHSA-3c8v-cfp5-9885"},{"ecosystem":"npm","fixed":["40.8.1"],"introduced":["40.0.0-alpha.1"],"last_affected":[],"package":"electron","purl":null,"source":"GHSA-3c8v-cfp5-9885"},{"ecosystem":"npm","fixed":["40.8.1"],"introduced":["40.0.0-alpha.1"],"last_affected":[],"package":"electron","purl":"pkg:npm/electron","source":"GHSA-3c8v-cfp5-9885"},{"ecosystem":"npm","fixed":["41.0.0"],"introduced":["41.0.0-alpha.1"],"last_affected":[],"package":"electron","purl":null,"source":"GHSA-3c8v-cfp5-9885"},{"ecosystem":"npm","fixed":["41.0.0"],"introduced":["41.0.0-alpha.1"],"last_affected":[],"package":"electron","purl":"pkg:npm/electron","source":"GHSA-3c8v-cfp5-9885"}],"prev":{"headline":"Electron: nodeIntegrationInWorker not correctly scoped in shared renderer processes","id":"CVE-2026-34775"},"products":["electron"],"published":"2026-04-03","related":[{"cvss_score":9.8,"headline":"Chromium Remote Code Execution in electron","id":"CVE-2017-16151","kev_date_added":null,"published":"2018-06-07"},{"cvss_score":8.8,"headline":"Electron protocol handler browser vulnerable to Command Injection","id":"CVE-2018-1000118","kev_date_added":null,"published":"2018-03-07"},{"cvss_score":8.4,"headline":"Electron: Context Isolation bypass via contextBridge VideoFrame transfer","id":"CVE-2026-34780","kev_date_added":null,"published":"2026-04-04"},{"cvss_score":8.3,"headline":"Electron: \u003cwebview\u003e can enable Node.js integration in Web Workers despite embedder restrictions","id":"CVE-2026-102676","kev_date_added":null,"published":"2026-09-29"},{"cvss_score":8.2,"headline":"Electron drops inherited HTML sandbox restrictions for popups opened through OpenURLFromTab","id":"CVE-2026-102673","kev_date_added":null,"published":"2026-09-29"},{"cvss_score":8.2,"headline":"Electron: Windows opened from a sandboxed top-level document do not inherit its sandbox restrictions","id":"CVE-2026-102674","kev_date_added":null,"published":"2026-09-29"},{"cvss_score":8.1,"headline":"Electron: Use-after-free in offscreen child window paint callback","id":"CVE-2026-34774","kev_date_added":null,"published":"2026-04-03"}],"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":"US public information, NVD API terms","name":"NVD"},{"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":"2026-04-06","vendors":["electron"]},"summary":"An out-of-bounds read in Electron's second-instance IPC allows local attackers to leak memory to the application's event handler.","url":"https://insights.sbomify.com/CVE-2026-34776/"}