Vulnerabilities (CVE)

Filtered by vendor Torproject Subscribe
Total 53 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2021-34548 1 Torproject 1 Tor 2026-06-17 5.0 MEDIUM 7.5 HIGH
An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-003. An attacker can forge RELAY_END or RELAY_RESOLVED to bypass the intended access control for ending a stream.
CVE-2021-28090 2 Fedoraproject, Torproject 2 Fedora, Tor 2026-06-17 5.0 MEDIUM 5.3 MEDIUM
Tor before 0.4.5.7 allows a remote attacker to cause Tor directory authorities to exit with an assertion failure, aka TROVE-2021-002.
CVE-2021-28089 2 Fedoraproject, Torproject 2 Fedora, Tor 2026-06-17 5.0 MEDIUM 7.5 HIGH
Tor before 0.4.5.7 allows a remote participant in the Tor directory protocol to exhaust CPU resources on a target, aka TROVE-2021-001.
CVE-2020-8516 1 Torproject 1 Tor 2026-06-17 5.0 MEDIUM 5.3 MEDIUM
The daemon in Tor through 0.4.1.8 and 0.4.2.x through 0.4.2.6 does not verify that a rendezvous node is known before attempting to connect to it, which might make it easier for remote attackers to discover circuit information. NOTE: The network team of Tor claims this is an intended behavior and not a vulnerability
CVE-2020-15572 1 Torproject 1 Tor 2026-06-17 4.3 MEDIUM 7.5 HIGH
Tor before 0.4.3.6 has an out-of-bounds memory access that allows a remote denial-of-service (crash) attack against Tor instances built to use Mozilla Network Security Services (NSS), aka TROVE-2020-001.
CVE-2020-10593 2 Opensuse, Torproject 3 Backports Sle, Leap, Tor 2026-06-17 5.0 MEDIUM 7.5 HIGH
Tor before 0.3.5.10, 0.4.x before 0.4.1.9, and 0.4.2.x before 0.4.2.7 allows remote attackers to cause a Denial of Service (memory leak), aka TROVE-2020-004. This occurs in circpad_setup_machine_on_circ because a circuit-padding machine can be negotiated twice on the same circuit.
CVE-2020-10592 2 Opensuse, Torproject 3 Backports, Leap, Tor 2026-06-17 7.8 HIGH 7.5 HIGH
Tor before 0.3.5.10, 0.4.x before 0.4.1.9, and 0.4.2.x before 0.4.2.7 allows remote attackers to cause a Denial of Service (CPU consumption), aka TROVE-2020-002.
CVE-2019-8955 1 Torproject 1 Tor 2026-06-17 5.0 MEDIUM 7.5 HIGH
In Tor before 0.3.3.12, 0.3.4.x before 0.3.4.11, 0.3.5.x before 0.3.5.8, and 0.4.x before 0.4.0.2-alpha, remote denial of service against Tor clients and relays can occur via memory exhaustion in the KIST cell scheduler.
CVE-2019-13075 1 Torproject 1 Tor Browser 2026-06-17 5.0 MEDIUM 5.3 MEDIUM
Tor Browser through 8.5.3 has an information exposure vulnerability. It allows remote attackers to detect the browser's language via vectors involving an IFRAME element, because text in that language is included in the title attribute of a LINK element for a non-HTML page. This is related to a behavior of Firefox before 68.
CVE-2019-12383 1 Torproject 1 Tor Browser 2026-06-17 4.3 MEDIUM 4.3 MEDIUM
Tor Browser before 8.0.1 has an information exposure vulnerability. It allows remote attackers to detect the browser's UI locale by measuring a button width, even if the user has a "Don't send my language" setting.
CVE-2018-16983 2 Noscript, Torproject 2 Noscript, Tor Browser 2026-06-17 7.5 HIGH 9.8 CRITICAL
NoScript Classic before 5.1.8.7, as used in Tor Browser 7.x and other products, allows attackers to bypass script blocking via the text/html;/json Content-Type value.
CVE-2018-0491 1 Torproject 1 Tor 2026-06-17 5.0 MEDIUM 7.5 HIGH
A use-after-free issue was discovered in Tor 0.3.2.x before 0.3.2.10. It allows remote attackers to cause a denial of service (relay crash) because the KIST implementation allows a channel to be added more than once in the pending list.
CVE-2018-0490 2 Debian, Torproject 2 Debian Linux, Tor 2026-06-17 5.0 MEDIUM 7.5 HIGH
An issue was discovered in Tor before 0.2.9.15, 0.3.1.x before 0.3.1.10, and 0.3.2.x before 0.3.2.10. The directory-authority protocol-list subprotocol implementation allows remote attackers to cause a denial of service (NULL pointer dereference and directory-authority crash) via a misformatted relay descriptor that is mishandled during voting.
CVE-2017-16639 2 Microsoft, Torproject 2 Windows, Tor Browser 2026-06-17 4.3 MEDIUM 4.3 MEDIUM
Tor Browser on Windows before 8.0 allows remote attackers to bypass the intended anonymity feature and discover a client IP address, a different vulnerability than CVE-2017-16541. User interaction is required to trigger this vulnerability.
CVE-2017-16541 5 Apple, Debian, Linux and 2 more 10 Macos, Debian Linux, Linux Kernel and 7 more 2026-06-17 4.3 MEDIUM 6.5 MEDIUM
Tor Browser before 7.0.9 on macOS and Linux allows remote attackers to bypass the intended anonymity feature and discover a client IP address via vectors involving a crafted web site that leverages file:// mishandling in Firefox, aka TorMoil. NOTE: Tails is unaffected.
CVE-2017-0380 1 Torproject 1 Tor 2026-06-17 4.3 MEDIUM 5.9 MEDIUM
The rend_service_intro_established function in or/rendservice.c in Tor before 0.2.8.15, 0.2.9.x before 0.2.9.12, 0.3.0.x before 0.3.0.11, 0.3.1.x before 0.3.1.7, and 0.3.2.x before 0.3.2.1-alpha, when SafeLogging is disabled, allows attackers to obtain sensitive information by leveraging access to the log files of a hidden service, because uninitialized stack data is included in an error message about construction of an introduction point circuit.
CVE-2017-0377 1 Torproject 1 Tor 2026-06-17 5.0 MEDIUM 7.5 HIGH
Tor 0.3.x before 0.3.0.9 has a guard-selection algorithm that only considers the exit relay (not the exit relay's family), which might allow remote attackers to defeat intended anonymity properties by leveraging the existence of large families.
CVE-2017-0376 2 Debian, Torproject 2 Debian Linux, Tor 2026-06-17 5.0 MEDIUM 7.5 HIGH
The hidden-service feature in Tor before 0.3.0.8 allows a denial of service (assertion failure and daemon exit) in the connection_edge_process_relay_cell function via a BEGIN_DIR cell on a rendezvous circuit.
CVE-2017-0375 1 Torproject 1 Tor 2026-06-17 5.0 MEDIUM 7.5 HIGH
The hidden-service feature in Tor before 0.3.0.8 allows a denial of service (assertion failure and daemon exit) in the relay_send_end_cell_from_edge_ function via a malformed BEGIN cell.
CVE-2016-9079 5 Debian, Microsoft, Mozilla and 2 more 11 Debian Linux, Windows, Firefox and 8 more 2026-06-17 5.0 MEDIUM 7.5 HIGH
A use-after-free vulnerability in SVG Animation has been discovered. An exploit built on this vulnerability has been discovered in the wild targeting Firefox and Tor Browser users on Windows. This vulnerability affects Firefox < 50.0.2, Firefox ESR < 45.5.1, and Thunderbird < 45.5.1.