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Bug bounty reports15,219

Publicly disclosed HackerOne reports, with the platform's own outcome and severity.

Program:Tor
Status
Severity
Weakness
Year
Bounty paid5
Access stated
Access needed
  • No account0
  • A user account0
  • A privileged role0
  • Admin0
  • Physical or local access0
  • Not clear from the report0
Clear filters53 of 15,219 reports
Disclosed bug bounty reports
ReportStatusWeaknessSeverityDisclosedBountyVotes
Sql query disclosure,#267922InformativeInformation Disclosure–2017-09-18––
Crashes/Buffer at 0x2C0086,name=PBrowser::Msg_Destroy#281682InformativeMemory Corruption–2017-10-24––
Cross-domain linkability when system time changed in Tor Browser#282339InformativeInformation Disclosure–2017-10-26––
Tor Browser: iframe with `data:` uri has access to parent window#358005InformativeNo weakness recorded–2018-06-06––
Stack overflow in UnbindFromTree (browser can be crashed remotely)#264481InformativeMemory Corruption–2017-10-02–1
Uncloaking hidden services and hidden service users#268113InformativeCryptography–2017-10-20–1
Use of uninitialized value in memarea_strdup (src/common/memarea.c:369)#274997InformativeMemory Corruption–2017-10-25–1
Enforce minimum master password complexity#280282N/AAuthentication–2017-10-19–1
Use of uninitialized value in networkstatus_parse_vote_from_string (src/or/routerparse.c:3533)#276253InformativeMemory Corruption–2017-10-31–2
Use of unitialized value in token_check_object (src/or/parsecommon.c:224)#276255DuplicateMemory Corruption–2019-10-04–3
Preferred language option fingerprinting issue in Tor Browser#281597InformativeInformation Disclosure–2017-10-24–3
Email Spoofing Possible on torproject.org Email Domain#423336N/AInput Validation and Logic–2018-10-16–3
Information Exposure Through Directory Listing#1316412N/AInformation Disclosure–2021-08-27–3
Tor Browser using --log or --verbose logs the exact connection time a client connects to any v2 domains.#1250273InformativeInformation Disclosure–2021-09-27–4
Tor Project - Full Path Disclosure#269426InformativeInformation Disclosure–2023-11-28–5
https://get.ooni.torproject.org/#274285N/ANo weakness recorded–2023-11-28–5
smartlist_add, smartlist_insert (may) cause heap corruption as a result of inadequate checks in smartlist_ensure_capacity#112386ValidMemory Corruption–2017-10-19–6
[tor] libevent dns remote stack overread vulnerability#112632ValidMemory Corruption–2017-10-19–6
libevent (stack) buffer overflow in evutil_parse_sockaddr_port#112784ValidMemory Corruption–2017-10-19–6
Overreads/overcopies in torsocks#126598ValidMemory Corruption–2017-10-19–6
Heap corruption via memarea.c#138025ValidMemory Corruption–2017-10-19–6
potential memory corruption in or/buffers.c (particularly on 32 bit)#163459ValidMemory Corruption–2017-10-19–6
Content spoofing on#273819InformativeMisconfiguration and Insecure Design–2023-11-28–6
[tor] control connection pre-auth DoS (infinite loop) with --enable-bufferevents#113424ValidDenial of Service–2017-10-19–7
[tor] libevent dns OOB read#115702ValidMemory Corruption–2017-10-19–7
Expose relay IP in the debug (The source is different from the rendering)#330721InformativeNo weakness recorded–2018-07-21–7
[tor] pre-emptive defenses, potential vulnerabilities#115686ValidMisconfiguration and Insecure Design–2017-11-26–8
[rt.torproject.org] No Rate Limitting on Login Form#265706InformativeAuthentication–2023-11-28–9
solving TOR vulnerability, in other to make bruteforce difficult#268320InformativeMemory Corruption–2023-11-28–9
Report Regarding Security Vulnerability#269243InformativeNo weakness recorded–2023-11-28–9
Use-after-free during XML transformations (MFSA-2016-27)#126797InformativeMemory Corruption–2017-10-21$30010
Simple CSS line-height identifies platform#256647ValidInformation Disclosure–2017-10-20–10
languagechange event fires simultaneously on all tabs#257942ValidInformation Disclosure–2017-10-19$10010
16 instances where return value of OpenSSL i2d_RSAPublicKey is discarded -- might lead to use of uninitialized memory#142773ValidInformation Disclosure–2017-11-26–11
Multiple Path Transversal Vulnerabilites#273377N/AFile and Path Handling–2023-11-28–11
Use of unitialized value in crypto_pk_num_bits (src/common/crypto.c:971)#274998InformativeMemory Corruption–2023-11-28–11
Expose user IP if TOR crashs#410087InformativeNo weakness recorded–2018-09-21–11
Detect Tor Browser's language#588239ValidInformation Disclosure–2019-05-29–11
[Android org.torproject.android] Possible to force list of bridges#252626InformativeAccess Control–2017-08-21–13
Zip bomb#263663InformativeMemory Corruption–2023-11-28–14
Address Bar Spoofing on TOR Browser#275960InformativeInput Validation and Logic–2023-01-02–14
Access to local file system using javascript#258630ValidMisconfiguration and Insecure Design–2017-11-18–15
De-anonymization by visiting specially crafted bookmark.#294364ValidInformation Disclosure–2018-07-03–15
SQL Injection in parameter REPORT#269347InformativeSQL Injection–2023-11-28–23
Potential IP revealing using UNC Path in Windows File Picker#376004InformativeInformation Disclosure–2023-11-28–25
Tor onion service INTRODUCE2 invalid-MAC cells permanently grow service replay cache#3709703ValidDenial of ServiceLow2026-09-10–28
Scrollbar Width permits detecting browser platform#252580ValidInformation Disclosure–2017-10-20–29
Snowflake server: Leak of TLS packets from other clients#1880610ValidInformation Disclosure–2023-03-15–30
Conflux-queued zero-length RELAY_END triggers heap out-of-bounds read#3709605ValidMemory CorruptionMedium2026-09-10–33
Malicious Conflux Endpoint Can Leave Stale Global OOO Queue Accounting After Teardown#3701692ValidDenial of ServiceLow2026-06-16$10035

Status and severity are HackerOne's. “Access stated” is what the title says; “Access needed” and techniques come from CyberSIXT's analysis of the public report (227 analysed so far), which can be wrong. Data as of 2026-11-14.

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