{"id":"CURL-CVE-2022-32206","summary":"HTTP compression denial of service","details":"curl supports \"chained\" HTTP compression algorithms, meaning that a server\nresponse can be compressed multiple times and potentially with different\nalgorithms. The number of acceptable \"links\" in this \"decompression chain\" was\nunbounded, allowing a malicious server to insert a virtually unlimited number\nof compression steps.\n\nThe use of such a decompression chain could result in a \"malloc bomb\", making\ncurl end up spending enormous amounts of allocated heap memory, or trying to\nand returning out of memory errors.","aliases":["CVE-2022-32206"],"modified":"2026-05-29T05:40:37.208601Z","published":"2022-06-27T08:00:00Z","database_specific":{"www":"https://curl.se/docs/CVE-2022-32206.html","CWE":{"desc":"Allocation of Resources Without Limits or Throttling","id":"CWE-770"},"URL":"https://curl.se/docs/CVE-2022-32206.json","affects":"both","award":{"currency":"USD","amount":"2400"},"issue":"https://hackerone.com/reports/1570651","last_affected":"7.83.1","package":"curl","severity":"Medium"},"affected":[{"ranges":[{"type":"SEMVER","events":[{"introduced":"7.57.0"},{"fixed":"7.84.0"}]},{"type":"GIT","repo":"https://github.com/curl/curl.git","events":[{"introduced":"dbcced8e32b50c068ac297106f0502ee200a1ebd"},{"fixed":"3a09fbb7f264c67c438d01a30669ce325aa508e2"}]}],"versions":["7.83.1","7.83.0","7.82.0","7.81.0","7.80.0","7.79.1","7.79.0","7.78.0","7.77.0","7.76.1","7.76.0","7.75.0","7.74.0","7.73.0","7.72.0","7.71.1","7.71.0","7.70.0","7.69.1","7.69.0","7.68.0","7.67.0","7.66.0","7.65.3","7.65.2","7.65.1","7.65.0","7.64.1","7.64.0","7.63.0","7.62.0","7.61.1","7.61.0","7.60.0","7.59.0","7.58.0","7.57.0","curl-7_83_1","curl-7_83_0","curl-7_82_0","curl-7_81_0","curl-7_80_0","curl-7_79_1","curl-7_79_0","curl-7_78_0","curl-7_77_0","curl-7_76_1","curl-7_76_0","curl-7_75_0","curl-7_74_0","curl-7_73_0","tiny-curl-7_72_0","curl-7_72_0","curl-7_71_1","curl-7_71_0","curl-7_70_0","curl-7_69_1","curl-7_69_0","curl-7_68_0","curl-7_67_0","curl-7_66_0","curl-7_65_3","curl-7_65_2","curl-7_65_1","curl-7_65_0","curl-7_64_1","curl-7_64_0","curl-7_63_0","curl-7_62_0","curl-7_61_1","curl-7_61_0","curl-7_60_0","curl-7_59_0","curl-7_58_0","curl-7_57_0"],"database_specific":{"source":"https://curl.se/docs/CURL-CVE-2022-32206.json","vanir_signatures_modified":"2026-05-29T05:40:37Z","vanir_signatures":[{"digest":{"line_hashes":["45157733837481580733201877978631346553","289994305010963280595464022725692321783","285418258574578001939871387444273795700","36972230101229254421458880172651761630","258485294902386500308213611257281103675","223508019877366983451146801494110424292","111336570175832252860899159343638748825","306740132958412367269024066267076989494","249434907631169292432704525991203976794","24000321900336010795433163882969240477"],"threshold":0.9},"id":"CURL-CVE-2022-32206-2afb59a3","signature_type":"Line","signature_version":"v1","source":"https://github.com/curl/curl.git/commit/3a09fbb7f264c67c438d01a30669ce325aa508e2","target":{"file":"lib/content_encoding.c"},"deprecated":false},{"signature_type":"Function","signature_version":"v1","source":"https://github.com/curl/curl.git/commit/3a09fbb7f264c67c438d01a30669ce325aa508e2","target":{"file":"lib/content_encoding.c","function":"Curl_build_unencoding_stack"},"deprecated":false,"digest":{"function_hash":"135163556199857411550722417587621050098","length":874},"id":"CURL-CVE-2022-32206-c8d05009"}]}}],"schema_version":"1.7.5","credits":[{"name":"Harry Sintonen","type":"FINDER"},{"name":"Daniel Stenberg","type":"REMEDIATION_DEVELOPER"}]}