{"answers":{"affected":"2 open source packages ship an affected version, including electerm.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49253 exists.","fix":"Upgrade electerm to 3.11.11 or later.","what":"CVE-2026-49253 is a high-severity path traversal vulnerability in electerm, published on 19 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-2026-49253 and fix it if it is affected.\n\nWhat it is: CVE-2026-49253 is a high-severity path traversal vulnerability in electerm, published on 19 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49253 exists.\n\nAffected packages and fixed versions:\n- electerm (npm): affected all versions; fixed in 3.11.11\n- electerm (npm): affected all versions; fixed in 3.11.11\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-2026-49253/ (Markdown: https://insights.sbomify.com/CVE-2026-49253/index.md)","id":"CVE-2026-49253","markdown":"https://insights.sbomify.com/CVE-2026-49253/index.md","name":"CVE-2026-49253","record":{"aliases":["GHSA-38j7-23hf-9mhc"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["data_modify","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"electerm terminal client","requires_auth":"none","summary":"A malicious SSH server can exploit path traversal in electerm to write files outside the selected download directory, potentially overwriting sensitive user files.","user_interaction":"required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L","version":"3.1"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. Prior to 3.11.11, electerm uses remote-supplied filenames directly with path.join() while receiving Zmodem and Trzsz transfers. In src/app/server/zmodem.js, prepareReceiveFile() joins the filename to the user-selected save path, and in src/app/server/trzsz.js, getUniqueFilePath(), the openSaveFile() callback, and the savedFilePaths mapping construct destinations without sanitization. A malicious SSH server or remote shell can provide a filename containing traversal components such as ../escaped.txt or ../../.bashrc. When the victim accepts the transfer and selects a download directory, electerm can write outside that directory and overwrite files accessible to the desktop user, potentially changing sensitive configuration or impairing availability. This issue is fixed in version 3.11.11.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"electerm: Path Traversal in Zmodem and Trzsz Download Filename Handling","id":"CVE-2026-49253","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"Dragonfly Manager OAuth provider client_secret disclosure via unauthenticated GET /api/v1/oauth","id":"CVE-2026-49254"},"packages":[{"ecosystem":"npm","fixed":["3.11.11"],"introduced":["0"],"last_affected":[],"package":"electerm","purl":null,"source":"GHSA-38j7-23hf-9mhc"},{"ecosystem":"npm","fixed":["3.11.11"],"introduced":["0"],"last_affected":[],"package":"electerm","purl":"pkg:npm/electerm","source":"GHSA-38j7-23hf-9mhc"}],"prev":{"headline":"deepstream is vulnerable to prototype pollution","id":"CVE-2026-49252"},"products":["electerm"],"published":"2026-08-19","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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-21","vendors":["electerm"]},"summary":"A malicious SSH server can exploit path traversal in electerm to write files outside the selected download directory, potentially overwriting sensitive user files.","url":"https://insights.sbomify.com/CVE-2026-49253/"}