{"id":"CVE-2023-38039","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-38039","generatedAt":"2026-11-04T23:01:27.019Z","title":"However, curl did not have a limit in how many or how large headers it would accept in a response, allowing a malicious server to stream an endless series of headers and eventually cause curl to run out of heap memory.","description":"When curl retrieves an HTTP response, it stores the incoming headers so that\nthey can be accessed later via the libcurl headers API.\n\nHowever, curl did not have a limit in how many or how large headers it would\naccept in a response, allowing a malicious server to stream an endless series\nof headers and eventually cause curl to run out of heap memory.","published":"2023-09-15T04:15:10.000Z","lastModified":"2026-06-17T06:09:17.000Z","status":"Modified","sourceIdentifier":"support@hackerone.com","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-770"],"affected":["haxx/curl","fedoraproject/fedora","microsoft/windows 10 1809","microsoft/windows 10 21h2","microsoft/windows 10 22h2","microsoft/windows 11 21h2","microsoft/windows 11 22h2","microsoft/windows 11 23h2","microsoft/windows server 2019","microsoft/windows server 2022"],"epss":{"score":0.56211,"percentile":0.99051,"date":"2026-11-03","history":[{"date":"2026-10-22","score":0.56371,"percentile":0.99057}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 56.2%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://seclists.org/fulldisclosure/2023/Oct/17","tags":["Mailing List","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"http://seclists.org/fulldisclosure/2024/Jan/34","tags":["Mailing List","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"http://seclists.org/fulldisclosure/2024/Jan/37","tags":["Mailing List","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"http://seclists.org/fulldisclosure/2024/Jan/38","tags":["Mailing List","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://hackerone.com/reports/2072338","tags":["Exploit","Issue Tracking","Patch","Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5DCZMYODALBLVOXVJEN2LF2MLANEYL4F/","tags":["Mailing List"],"source":"support@hackerone.com"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M6KGKB2JNZVT276JYSKI6FV2VFJUGDOJ/","tags":["Mailing List"],"source":"support@hackerone.com"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TEAWTYHC3RT6ZRS5OZRHLAIENVN6CCIS/","tags":["Mailing List"],"source":"support@hackerone.com"},{"url":"https://security.gentoo.org/glsa/202310-12","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://security.netapp.com/advisory/ntap-20231013-0005/","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://support.apple.com/kb/HT214036","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://support.apple.com/kb/HT214057","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://support.apple.com/kb/HT214058","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://support.apple.com/kb/HT214063","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"https://www.insyde.com/security-pledge/SA-2023064","tags":["Third Party Advisory"],"source":"support@hackerone.com"},{"url":"http://seclists.org/fulldisclosure/2023/Oct/17","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2024/Jan/34","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2024/Jan/37","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2024/Jan/38","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://hackerone.com/reports/2072338","tags":["Exploit","Issue Tracking","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5DCZMYODALBLVOXVJEN2LF2MLANEYL4F/","tags":["Mailing List"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M6KGKB2JNZVT276JYSKI6FV2VFJUGDOJ/","tags":["Mailing List"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TEAWTYHC3RT6ZRS5OZRHLAIENVN6CCIS/","tags":["Mailing List"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/202310-12","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20231013-0005/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT214036","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT214057","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT214058","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT214063","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.insyde.com/security-pledge/SA-2023064","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-38039","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}