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You can search for vulnerabilities managed by JVN (Japan Vulnerability Note) and NVD (National Vulnerability Database).
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To search by CWE, please refer to the CWE Overview and check the CWE number.

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JVN Vulnerability Information

Update Date":June 2, 2026, 6 p.m.

No CVSS Level
Attach Vector		 Vendor Name Project Name Title CWE CVE Update Date Publication Date Impact
Show		 Exploit
PoC
Search
256231 5 警告 Opera Software ASA - Opera におけるサービス運用妨害 (DoS) の脆弱性 CWE-399
リソース管理の問題 		CVE-2009-2577 2010-09-27 16:12 2009-07-22 Show GitHub Exploit DB Packet Storm
256232 4.3 警告 Opera Software ASA - Opera におけるサービス運用妨害 (DoS) の脆弱性 CWE-399
リソース管理の問題 		CVE-2009-2540 2010-09-27 16:11 2009-07-20 Show GitHub Exploit DB Packet Storm
256233 4.3 警告 Opera Software ASA - Opera における javascript: URI をブロックしない脆弱性 CWE-79
クロスサイト・スクリプティング（XSS） 		CVE-2009-2351 2010-09-27 16:11 2009-07-7 Show GitHub Exploit DB Packet Storm
256234 6.8 警告 Opera Software ASA - Opera における任意の https サイトになりすまされる脆弱性 CWE-287
不適切な認証 		CVE-2009-2070 2010-09-27 16:11 2009-06-15 Show GitHub Exploit DB Packet Storm
256235 6.8 警告 Opera Software ASA - Opera における任意の Web スクリプトを実行される脆弱性 CWE-287
不適切な認証 		CVE-2009-2067 2010-09-27 16:10 2009-06-15 Show GitHub Exploit DB Packet Storm
256236 6.8 警告 Opera Software ASA - Opera における任意の Web スクリプトを実行される脆弱性 CWE-287
不適切な認証 		CVE-2009-2063 2010-09-27 16:10 2009-06-15 Show GitHub Exploit DB Packet Storm
256237 6.8 警告 Opera Software ASA - Opera における任意の Web スクリプトを実行される脆弱性 CWE-287
不適切な認証 		CVE-2009-2059 2010-09-27 16:10 2009-06-15 Show GitHub Exploit DB Packet Storm
256238 9.3 危険 アドビシステムズ
Opera Software ASA		 - Opera における Adobe Acrobat の JavaScript の制限を回避される脆弱性 CWE-264
認可・権限・アクセス制御 		CVE-2009-1599 2010-09-27 16:09 2009-05-11 Show GitHub Exploit DB Packet Storm
256239 5 警告 Opera Software ASA - Opera におけるサービス運用妨害 (DoS) の脆弱性 CWE-399
リソース管理の問題 		CVE-2008-7245 2010-09-27 16:09 2009-09-18 Show GitHub Exploit DB Packet Storm
256240 9.3 危険 Opera Software ASA - Windows 上で稼働する Opera におけるヒープベースのバッファオーバーフローの脆弱性 CWE-119
バッファエラー 		CVE-2008-5178 2010-09-27 16:09 2008-11-20 Show GitHub Exploit DB Packet Storm
NVD Vulnerability Information

Update Date:June 2, 2026, 4:18 a.m.

No CVSS Level
Attach Vector		 Vendor Name Project Name Title CWE CVE Update Date Publication Date Show Affected Exploit
PoC
Search
194991 8.8 HIGH
Network 		mozilla firefox Mozilla developers reported memory safety bugs present in Firefox 85. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been expl… CWE-787
 Out-of-bounds Write 		CVE-2021-23979 2024-11-21 14:52 2021-02-27 Show GitHub Exploit DB Packet Storm
194992 8.8 HIGH
Network 		mozilla
debian 		firefox
firefox_esr
thunderbird
debian_linux 		Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these… CWE-787
 Out-of-bounds Write 		CVE-2021-23978 2024-11-21 14:52 2021-02-27 Show GitHub Exploit DB Packet Storm
194993 8.8 HIGH
Network 		mozilla firefox Mozilla developers reported memory safety bugs present in Firefox 84. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been expl… CWE-787
 Out-of-bounds Write 		CVE-2021-23965 2024-11-21 14:52 2021-02-27 Show GitHub Exploit DB Packet Storm
194994 8.8 HIGH
Network 		mozilla firefox
firefox_esr
thunderbird 		Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these… CWE-787
 Out-of-bounds Write 		CVE-2021-23964 2024-11-21 14:52 2021-02-27 Show GitHub Exploit DB Packet Storm
194995 5.3 MEDIUM
Network 		mozilla firefox Firefox for Android suffered from a time-of-check-time-of-use vulnerability that allowed a malicious application to read sensitive data from application directories. Note: This issue is only affected… CWE-367
 Time-of-check Time-of-use (TOCTOU) Race Condition 		CVE-2021-23977 2024-11-21 14:52 2021-02-26 Show GitHub Exploit DB Packet Storm
194996 4.3 MEDIUM
Network 		mozilla firefox When sharing geolocation during an active WebRTC share, Firefox could have reset the webRTC sharing state in the user interface, leading to loss of control over the currently granted permission. This… CWE-281
 Improper Preservation of Permissions 		CVE-2021-23963 2024-11-21 14:52 2021-02-26 Show GitHub Exploit DB Packet Storm
194997 8.8 HIGH
Network 		mozilla firefox Incorrect use of the '<RowCountChanged>' method could have led to a user-after-poison and a potentially exploitable crash. This vulnerability affects Firefox < 85. NVD-CWE-noinfo
CVE-2021-23962 2024-11-21 14:52 2021-02-26 Show GitHub Exploit DB Packet Storm
194998 7.4 HIGH
Network 		mozilla
debian 		firefox
debian_linux 		Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine.… NVD-CWE-noinfo
CVE-2021-23961 2024-11-21 14:52 2021-02-26 Show GitHub Exploit DB Packet Storm
194999 8.8 HIGH
Network 		mozilla firefox
firefox_esr
thunderbird 		Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, an… NVD-CWE-noinfo
CVE-2021-23960 2024-11-21 14:52 2021-02-26 Show GitHub Exploit DB Packet Storm
195000 6.1 MEDIUM
Network 		mozilla firefox An XSS bug in internal error pages could have led to various spoofing attacks, including other error pages and the address bar. Note: This issue only affected Firefox for Android. Other operating sys… CWE-79
Cross-site Scripting 		CVE-2021-23959 2024-11-21 14:52 2021-02-26 Show GitHub Exploit DB Packet Storm