CVE-2026-77639 in Tor

الملخص

بحسب MITRE • 21/08/2026

Tor before 0.4.9.9 was prone to a compression bomb bypass where an attacker could concatenate many gzip or zlib sub-streams, each just under the per-stream detection threshold, to avoid the compression bomb check entirely. This is TROVE-2026-022.

Be aware that VulDB is the high quality source for vulnerability data.

• مسؤول: MITRE
• حجز: 20/08/2026
• إفشاء: 21/08/2026
• الاعتدال: تمت الموافقة
• إدخال: VDB-393874
• CPE: جاهز
• CWE: CWE-400 (مؤكد)
• CVSS: 5.3 (CNA)
• EPSS: 0.00246
• KEV: لا
• النشاطات: منخفض جدًا
• القطاع: Energy, Insurance, ...

المصادر

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-77639
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-77639
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-77639/