{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-77638 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-77638 is a high-severity vulnerability in torproject Tor, published on 20 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-2026-77638 and fix it if it is affected.\n\nWhat it is: CVE-2026-77638 is a high-severity vulnerability in torproject Tor, published on 20 Aug 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-2026-77638 in the wild and no public exploit code.\n\nAffected product: torproject Tor. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-77638/ (Markdown: https://insights.sbomify.com/CVE-2026-77638/index.md)","id":"CVE-2026-77638","markdown":"https://insights.sbomify.com/CVE-2026-77638/index.md","name":"CVE-2026-77638","record":{"aliases":["DEBIAN-CVE-2026-77638","GHSA-pq38-gw56-4w65","UBUNTU-CVE-2026-77638"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Tor anonymity network","requires_auth":"none","summary":"A race condition allows a malicious rendezvous point to impersonate an onion service, enabling man-in-the-middle attacks against Tor clients.","user_interaction":"not_required","vuln_class":"race_condition"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"tor","vendor":"torproject"}],"cvss":{"score":8.9,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L","version":"3.1"},"cwes":[{"id":"CWE-362","name":"Concurrent Execution using Shared Resource with Improper Synchronization"}],"description":"Tor before 0.4.9.11 is prone to a race condition where in just the right circumstances a rendezvous point could man-in-the-middle (impersonate) the onion service that the client was trying to reach.","ecosystems":[],"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":"Race condition in Tor","id":"CVE-2026-77638","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"race_condition","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Denial of service in Tor","id":"CVE-2026-77639"},"packages":[],"prev":{"headline":"Cloudreve: Privilege Scope Bypass: State-Mutating Admin Operations Accessible via Read-Only OAuth Scope","id":"CVE-2026-77637"},"products":["Tor"],"published":"2026-08-20","related":[{"cvss_score":7.5,"headline":"Memory corruption in Tor","id":"CVE-2026-77642","kev_date_added":null,"published":"2026-08-20"},{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2022-33903","kev_date_added":null,"published":"2022-07-17"},{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2021-38385","kev_date_added":null,"published":"2021-08-30"},{"cvss_score":7.5,"headline":"Security feature bypass in n/a","id":"CVE-2021-34548","kev_date_added":null,"published":"2021-06-29"},{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2021-34549","kev_date_added":null,"published":"2021-06-29"},{"cvss_score":7.5,"headline":"Memory corruption in n/a","id":"CVE-2021-34550","kev_date_added":null,"published":"2021-06-29"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"total"},"state":"PUBLISHED","updated":"2026-08-27","vendors":["torproject"]},"summary":"A race condition allows a malicious rendezvous point to impersonate an onion service, enabling man-in-the-middle attacks against Tor clients.","url":"https://insights.sbomify.com/CVE-2026-77638/"}