{"answers":{"affected":"4 open source packages ship an affected version, including goshs.de/goshs/v2 and goshs.de/goshs.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-50139 exists.","fix":"Upgrade goshs.de/goshs/v2 to 2.1.0 or later.","what":"CVE-2026-50139 is a medium-severity vulnerability in patrickhener goshs, published on 18 Aug 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-2026-50139 and fix it if it is affected.\n\nWhat it is: CVE-2026-50139 is a medium-severity vulnerability in patrickhener goshs, published on 18 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-50139 exists.\n\nAffected packages and fixed versions:\n- goshs.de/goshs/v2 (Go): affected all versions; fixed in 2.1.0\n- goshs.de/goshs/v2 (Go): affected all versions; fixed in 2.1.0\n- goshs.de/goshs/v2 (Go): affected all versions; fixed in 2.1.0\n- goshs.de/goshs (Go): affected all versions; no fix listed\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-2026-50139/ (Markdown: https://insights.sbomify.com/CVE-2026-50139/index.md)","id":"CVE-2026-50139","markdown":"https://insights.sbomify.com/CVE-2026-50139/index.md","name":"CVE-2026-50139","record":{"aliases":["GHSA-j48m-h7xq-2xpj","GO-2026-5881"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Go HTTP server","requires_auth":"none","summary":"Concurrent requests bypass download limits in goshs due to a race condition, allowing attackers to exceed configured caps.","user_interaction":"not_required","vuln_class":"race_condition"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-362","name":"Concurrent Execution using Shared Resource with Improper Synchronization"}],"description":"goshs is a SimpleHTTPServer written in Go. Prior to version 2.1.0, `ShareHandler` reads the share token's `DownloadLimit` under `RLock`, releases the lock, serves the file, then re-acquires the lock to increment the counter. Concurrent requests all read the same `Downloaded`/`DownloadLimit` snapshot, all pass the check, and all are served — exceeding the operator's intended cap. Version 2.1.0 patches the issue.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"goshs: Share-link ?token=… redemption races past download limit","id":"CVE-2026-50139","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"race_condition","year":"2026"},"n_packages":4,"n_references":1,"next":{"headline":"Woodpecker gRPC agent_id metadata can be spoofed- cross-tenant agent impersonation","id":"CVE-2026-50141"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"goshs.de/goshs","purl":"pkg:golang/goshs.de/goshs","source":"GO-2026-5881"},{"ecosystem":"Go","fixed":["2.1.0"],"introduced":["0"],"last_affected":[],"package":"goshs.de/goshs/v2","purl":null,"source":"GHSA-j48m-h7xq-2xpj"},{"ecosystem":"Go","fixed":["2.1.0"],"introduced":["0"],"last_affected":[],"package":"goshs.de/goshs/v2","purl":"pkg:golang/goshs.de/goshs/v2","source":"GHSA-j48m-h7xq-2xpj"},{"ecosystem":"Go","fixed":["2.1.0"],"introduced":["0"],"last_affected":[],"package":"goshs.de/goshs/v2","purl":"pkg:golang/goshs.de/goshs/v2","source":"GO-2026-5881"}],"prev":{"headline":"goshs: WebDAV listener ignores --read-only, --upload-only, and --no-delete mode flags","id":"CVE-2026-50138"},"products":["goshs"],"published":"2026-08-18","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":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"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":"2026-08-19","vendors":["patrickhener"]},"summary":"Concurrent requests bypass download limits in goshs due to a race condition, allowing attackers to exceed configured caps.","url":"https://insights.sbomify.com/CVE-2026-50139/"}