{"id":"CVE-2010-1866","aliases":["EUVD-2010-1886","GHSA-cwwq-64rr-rv47"],"status":"published","title":"The dechunk filter in PHP 5.3 through 5.3.2, when decoding an HTTP chunked encoding stream,...","description":"The dechunk filter in PHP 5.3 through 5.3.2, when decoding an HTTP chunked encoding stream, allows context-dependent attackers to cause a denial of service (crash) and possibly trigger memory corruption via a negative chunk size, which bypasses a signed comparison, related to an integer overflow in the chunk size decoder.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.06723,"percentile":0.93987,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-190"],"published":"2010-05-07T22:00:00Z","modified":"2026-06-16T23:19:29Z","exploits":[{"source":"exploitdb","id":"EDB-33920","title":"PHP 5.3 - 'PHP_dechunk()' HTTP Chunked Encoding Integer Overflow","type":"remote","platform":"php","date":"2010-05-02","verified":true,"url":"https://www.exploit-db.com/exploits/33920"}],"products":[{"vendor":"opensuse","product":"opensuse"},{"vendor":"php","product":"php"},{"vendor":"suse","product":"linux_enterprise"}],"references":[{"url":"http://php-security.org/2010/05/02/mops-2010-003-php-dechunk-filter-signed-comparison-vulnerability/index.html","tags":["x_refsource_MISC","x_transferred","Broken Link","Exploit"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00006.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","Mailing List"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2010-1866"},{"url":"https://github.com/advisories/GHSA-cwwq-64rr-rv47"}],"sources":{"cve":[{"id":"CVE-2010-1866","description":"The dechunk filter in PHP 5.3 through 5.3.2, when decoding an HTTP chunked encoding stream, allows context-dependent attackers to cause a denial of service (crash) and possibly trigger memory corruption via a negative chunk size, which bypasses a signed comparison, related to an integer overflow in the chunk size decoder.","status":"published","published":"2010-05-07T22:00:00Z","modified":"2024-08-07T01:35:53.63Z","updated_at":"2026-11-02T14:33:28.858903Z"}],"euvd":[{"id":"EUVD-2010-1886","description":"The dechunk filter in PHP 5.3 through 5.3.2, when decoding an HTTP chunked encoding stream, allows context-dependent attackers to cause a denial of service (crash) and possibly trigger memory corruption via a negative chunk size, which bypasses a signed comparison, related to an integer overflow in the chunk size decoder.","status":"published","published":"2010-05-07T22:00:00Z","modified":"2024-08-07T01:35:53Z","updated_at":"2026-11-03T01:39:39.801604Z"}],"ghsa":[{"id":"GHSA-cwwq-64rr-rv47","title":"The dechunk filter in PHP 5.3 through 5.3.2, when decoding an HTTP chunked encoding stream,...","description":"The dechunk filter in PHP 5.3 through 5.3.2, when decoding an HTTP chunked encoding stream, allows context-dependent attackers to cause a denial of service (crash) and possibly trigger memory corruption via a negative chunk size, which bypasses a signed comparison, related to an integer overflow in the chunk size decoder.","status":"published","published":"2022-05-17T05:47:59Z","modified":"2026-03-16T05:08:34Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T15:06:38.778049Z"}],"nvd":[{"id":"CVE-2010-1866","description":"The dechunk filter in PHP 5.3 through 5.3.2, when decoding an HTTP chunked encoding stream, allows context-dependent attackers to cause a denial of service (crash) and possibly trigger memory corruption via a negative chunk size, which bypasses a signed comparison, related to an integer overflow in the chunk size decoder.","status":"published","published":"2010-05-07T23:00:01.86Z","modified":"2026-06-16T23:19:29.19Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:01:45.97784Z"}]}}