{"id":"CVE-2026-77587","title":"Tor before 0.4.9.11 is prone to a use-after-free (and potential double free) of a conflux object when a recovery leg revives a conflux set whose last linked leg has already been closed","summary":"Tor before 0.4.9.11 is prone to a use-after-free (and potential double free) of a conflux object when a recovery leg revives a conflux set whose last linked leg has already been closed. A malicious exit node could use this to crash a cli…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-911","CWE-416"],"vendor":"torproject","product":"tor","affected":["tor < 0.4.9.11"],"patched":["tor 0.4.9.11"],"published":"2026-08-20","updated":"2026-09-16","sourceUpdated":"2026-09-16T14:09:19.390","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-77587","references":[{"url":"https://gitlab.torproject.org/tpo/core/tor/-/raw/tor-0.4.9.11/ChangeLog","label":"cve@mitre.org"}],"tags":["nvd"],"epss":0.00232,"epssPercentile":0.14285,"ingestedAt":"2026-09-16T14:57:28.002Z","slug":"CVE-2026-77587","body":"## Overview\n\nTor before 0.4.9.11 is prone to a use-after-free (and potential double free) of a conflux object when a recovery leg revives a conflux set whose last linked leg has already been closed. A malicious exit node could use this to crash a client. This is TROVE-2026-026.\n\n## Affected\n\n- `tor < 0.4.9.11`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `tor 0.4.9.11`","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":32.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}