{"id":"CVE-2007-5276","aliases":["EUVD-2007-5256","GHSA-vw2g-3hc3-gg3f"],"status":"published","title":"Opera 9 drops DNS pins based on failed connections to irrelevant TCP ports, which makes it easier...","description":"Opera 9 drops DNS pins based on failed connections to irrelevant TCP ports, which makes it easier for remote attackers to conduct DNS rebinding attacks, as demonstrated by a port 81 URL in an IMG SRC, when the DNS pin had been established for a session on port 80.","severity":{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01391,"percentile":0.72511,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2007-10-08T23:00:00Z","modified":"2026-06-16T22:45:48Z","products":[{"vendor":"opera","product":"opera_browser"}],"references":[{"url":"http://crypto.stanford.edu/dns/dns-rebinding.pdf","tags":["x_refsource_MISC","x_transferred","Technical Description","Third Party Advisory"]},{"url":"http://osvdb.org/45526","tags":["vdb-entry","x_refsource_OSVDB","x_transferred","Broken Link"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2007-5276"},{"url":"https://github.com/advisories/GHSA-vw2g-3hc3-gg3f"}],"sources":{"cve":[{"id":"CVE-2007-5276","description":"Opera 9 drops DNS pins based on failed connections to irrelevant TCP ports, which makes it easier for remote attackers to conduct DNS rebinding attacks, as demonstrated by a port 81 URL in an IMG SRC, when the DNS pin had been established for a session on port 80.","status":"published","published":"2007-10-08T23:00:00Z","modified":"2024-08-07T15:24:42.451Z","updated_at":"2026-11-02T13:32:11.910312Z"}],"euvd":[{"id":"EUVD-2007-5256","description":"Opera 9 drops DNS pins based on failed connections to irrelevant TCP ports, which makes it easier for remote attackers to conduct DNS rebinding attacks, as demonstrated by a port 81 URL in an IMG SRC, when the DNS pin had been established for a session on port 80.","status":"published","published":"2007-10-08T23:00:00Z","modified":"2024-08-07T15:24:42Z","updated_at":"2026-11-03T01:16:17.784694Z"}],"ghsa":[{"id":"GHSA-vw2g-3hc3-gg3f","title":"Opera 9 drops DNS pins based on failed connections to irrelevant TCP ports, which makes it easier...","description":"Opera 9 drops DNS pins based on failed connections to irrelevant TCP ports, which makes it easier for remote attackers to conduct DNS rebinding attacks, as demonstrated by a port 81 URL in an IMG SRC, when the DNS pin had been established for a session on port 80.","status":"published","published":"2022-05-01T18:31:54Z","modified":"2023-01-31T05:04:41Z","updated_at":"2026-11-02T14:48:42.977051Z"}],"nvd":[{"id":"CVE-2007-5276","description":"Opera 9 drops DNS pins based on failed connections to irrelevant TCP ports, which makes it easier for remote attackers to conduct DNS rebinding attacks, as demonstrated by a port 81 URL in an IMG SRC, when the DNS pin had been established for a session on port 80.","status":"published","published":"2007-10-08T23:17:00Z","modified":"2026-06-16T22:45:48.517Z","cvss":[{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:01:21.141213Z"}]}}