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You can search for vulnerabilities managed by JVN (Japan Vulnerability Note) and NVD (National Vulnerability Database).
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JVN Vulnerability Information

Update Date":May 27, 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
255901	4.3	警告	Opera Software ASA	-	Windows 上で稼働する 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-2008-5428	2010-09-27 16:07	2008-12-11	Show	GitHub Exploit DB Packet Storm

255902	4.3	警告	Opera Software ASA	-	Opera の Opera.dll におけるクロスサイトスクリプティングの脆弱性	CWE-79 クロスサイト・スクリプティング（XSS）	CVE-2008-4725	2010-09-27 16:07	2008-10-23	Show	GitHub Exploit DB Packet Storm

255903	5.8	警告	Opera Software ASA	-	Opera における新規フィードの購読を作成される脆弱性	CWE-264 認可・権限・アクセス制御	CVE-2008-4698	2010-09-27 16:05	2008-10-23	Show	GitHub Exploit DB Packet Storm

255904	10	危険	Opera Software ASA	-	Windows 上で稼働する Opera における任意のコードを実行される脆弱性	CWE-noinfo 情報不足	CVE-2008-4293	2010-09-27 16:05	2008-09-27	Show	GitHub Exploit DB Packet Storm

255905	10	危険	Opera Software ASA	-	Opera における CRL の更新時の処理に関する脆弱性	CWE-255 CWE-noinfo	CVE-2008-4292	2010-09-27 16:04	2008-09-27	Show	GitHub Exploit DB Packet Storm

255906	6.4	警告	Opera Software ASA	-	Opera における Web スクリプトを含むページの URL をアドレスフィールドに表示される脆弱性	CWE-20 不適切な入力確認	CVE-2008-4200	2010-09-27 16:04	2008-09-27	Show	GitHub Exploit DB Packet Storm

255907	5	警告	Opera Software ASA	-	Opera におけるローカルファイル名の有効性を判別される脆弱性	CWE-200 情報漏えい	CVE-2008-4199	2010-09-27 16:04	2008-09-27	Show	GitHub Exploit DB Packet Storm

255908	7.5	危険	Opera Software ASA	-	Opera における http ページ上で危険な操作を実行させられる脆弱性	CWE-Other その他	CVE-2008-4198	2010-09-27 16:03	2008-09-27	Show	GitHub Exploit DB Packet Storm

255909	9.3	危険	Opera Software ASA	-	Opera における任意のコードを実行される脆弱性	CWE-399 リソース管理の問題	CVE-2008-4197	2010-09-27 16:03	2008-09-27	Show	GitHub Exploit DB Packet Storm

255910	4.3	警告	Opera Software ASA	-	Opera におけるクロスサイトスクリプティングの脆弱性	CWE-79 クロスサイト・スクリプティング（XSS）	CVE-2008-4196	2010-09-27 16:02	2008-09-27	Show	GitHub Exploit DB Packet Storm

NVD Vulnerability Information

Update Date:May 27, 2026, 4:52 a.m.

No	CVSS	Level Attach Vector	Vendor Name	Project Name	Title	CWE	CVE	Update Date	Publication Date	Show Affected	Exploit PoC Search
195421	8.8	HIGH Network	google microsoft	chrome edge_chromium	Insufficient policy enforcement in extensions in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to bypass content security policy via a crafted Chrome Extension.	NVD-CWE-Other	CVE-2021-21127	2024-11-21 14:47	2021-02-9	Show	GitHub Exploit DB Packet Storm

195422	6.5	MEDIUM Network	google microsoft	chrome edge_chromium	Insufficient policy enforcement in extensions in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to bypass site isolation via a crafted Chrome Extension.	CWE-20 Improper Input Validation	CVE-2021-21126	2024-11-21 14:47	2021-02-9	Show	GitHub Exploit DB Packet Storm

195423	8.1	HIGH Network	google microsoft	chrome edge_chromium	Insufficient policy enforcement in File System API in Google Chrome on Windows prior to 88.0.4324.96 allowed a remote attacker to bypass filesystem restrictions via a crafted HTML page.	CWE-59 Link Following	CVE-2021-21125	2024-11-21 14:47	2021-02-9	Show	GitHub Exploit DB Packet Storm

195424	9.6	CRITICAL Network	google microsoft	chrome edge_chromium	Potential user after free in Speech Recognizer in Google Chrome on Android prior to 88.0.4324.96 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page.	CWE-416 Use After Free	CVE-2021-21124	2024-11-21 14:47	2021-02-9	Show	GitHub Exploit DB Packet Storm

195425	6.5	MEDIUM Network	google microsoft	chrome edge_chromium	Insufficient data validation in File System API in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to bypass filesystem restrictions via a crafted HTML page.	CWE-20 Improper Input Validation	CVE-2021-21123	2024-11-21 14:47	2021-02-9	Show	GitHub Exploit DB Packet Storm

195426	8.8	HIGH Network	google microsoft	chrome edge_chromium	Use after free in Blink in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.	CWE-416 Use After Free	CVE-2021-21122	2024-11-21 14:47	2021-02-9	Show	GitHub Exploit DB Packet Storm

195427	9.6	CRITICAL Network	google microsoft	chrome edge_chromium	Use after free in Omnibox in Google Chrome on Linux prior to 88.0.4324.96 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page.	CWE-416 Use After Free	CVE-2021-21121	2024-11-21 14:47	2021-02-9	Show	GitHub Exploit DB Packet Storm

195428	8.8	HIGH Network	google microsoft	chrome edge_chromium	Use after free in WebSQL in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.	CWE-416 Use After Free	CVE-2021-21120	2024-11-21 14:47	2021-02-9	Show	GitHub Exploit DB Packet Storm

195429	8.8	HIGH Network	google microsoft	chrome edge_chromium	Use after free in Media in Google Chrome prior to 88.0.4324.96 allowed a remote attacker who had compromised the renderer process to potentially exploit heap corruption via a crafted HTML page.	CWE-416 Use After Free	CVE-2021-21119	2024-11-21 14:47	2021-02-9	Show	GitHub Exploit DB Packet Storm

195430	8.8	HIGH Network	google microsoft	chrome edge_chromium	Insufficient data validation in V8 in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to potentially perform out of bounds memory access via a crafted HTML page.	CWE-119 Incorrect Access of Indexable Resource ('Range Error')	CVE-2021-21118	2024-11-21 14:47	2021-02-9	Show	GitHub Exploit DB Packet Storm

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