← Vulnerability feed

Vulnerability record · CVE-2020-8286 · published 14 December 2020

CVE-2020-8286: Haxx libcurl improper certificate validation vulnerability

Haxx · Libcurl

curl 7.41.0 through 7.73.0 is vulnerable to an improper check for certificate revocation due to insufficient verification of the OCSP response.

7.5 CVSS 3.1 High EPSS 4.6% · top 8.6% CWE-295 · Improper certificate validation
7.5CVSS 3.1 base score, v2 5.0
4.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
17Affected product versions listed by NVD
38References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

curl 7.41.0 through 7.73.0 is vulnerable to an improper check for certificate revocation due to insufficient verification of the OCSP response.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

17 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://seclists.org/fulldisclosure/2021/Apr/50 Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2021/Apr/51 Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2021/Apr/54 Mailing ListThird Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-200951.pdf Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf PatchThird Party Advisory
https://curl.se/docs/CVE-2020-8286.html Vendor Advisory
https://hackerone.com/reports/1048457 ExploitPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/12/msg00029.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DAEHE2S2QLO4AO4MEEYL75N Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NZUVSQHN2ESHMJXNQ2Z7T2E Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202012-14 Third Party Advisory
https://security.netapp.com/advisory/ntap-20210122-0007/ Third Party Advisory
https://support.apple.com/kb/HT212325 Third Party Advisory
https://support.apple.com/kb/HT212326 Third Party Advisory
https://support.apple.com/kb/HT212327 Third Party Advisory
https://www.debian.org/security/2021/dsa-4881 Third Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.html Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.html Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html PatchThird Party Advisory
http://seclists.org/fulldisclosure/2021/Apr/50 Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2021/Apr/51 Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2021/Apr/54 Mailing ListThird Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-200951.pdf Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf PatchThird Party Advisory
https://curl.se/docs/CVE-2020-8286.html Vendor Advisory
https://hackerone.com/reports/1048457 ExploitPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/12/msg00029.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DAEHE2S2QLO4AO4MEEYL75N Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NZUVSQHN2ESHMJXNQ2Z7T2E Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202012-14 Third Party Advisory
https://security.netapp.com/advisory/ntap-20210122-0007/ Third Party Advisory
https://support.apple.com/kb/HT212325 Third Party Advisory
https://support.apple.com/kb/HT212326 Third Party Advisory
https://support.apple.com/kb/HT212327 Third Party Advisory
https://www.debian.org/security/2021/dsa-4881 Third Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.html Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.html Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html PatchThird Party Advisory

Track CVE-2020-8286 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2025-43300Apple iOS, iPadOS and macOS out-of-bounds write via malicious imageAn out-of-bounds write in Apple iOS, iPadOS and macOS is triggered when processing a malicious image file, causing memory corruption. Apple states th…KEVEPSS 22%analysed10.0CVE-2025-32433Erlang/OTP SSH server missing authentication allows remote code executionErlang/OTP SSH servers before OTP-27.3.3, OTP-26.2.5.11 and OTP-25.3.2.20 mishandle SSH protocol messages, letting an unauthenticated attacker execut…KEVEPSS 99%analysed10.0CVE-2025-24201Apple WebKit out-of-bounds write allows sandbox escapeCVE-2025-24201 is an out-of-bounds write in Apple's WebKit that was addressed with improved checks. Maliciously crafted web content may break out of …KEVEPSS 3.8%analysed10.0CVE-2025-24085Apple iOS, iPadOS, macOS, tvOS, visionOS, watchOS Use-After-Free Privilege EscalationA use-after-free flaw in Apple's operating systems was fixed through improved memory management in iOS 18.3, iPadOS 18.3 and 17.7.6, macOS Sequoia 15…KEVEPSS 18%analysed10.0CVE-2021-44228Apache Log4j2 JNDI lookup remote code executionApache Log4j2 versions 2.0-beta9 through 2.15.0 (excluding 2.12.2, 2.12.3, and 2.3.1) do not protect against attacker-controlled LDAP and other JNDI …KEVEPSS 100%analysed9.8CVE-2026-65400Apple macOS Screen Sharing authentication bypassAn improper authentication flaw in Apple macOS Screen Sharing allows a network attacker to authenticate without valid credentials. Apple fixed it via…KEVEPSS 1.2%analysed9.8CVE-2026-24061GNU Inetutils telnetd argument injection allows remote auth bypasstelnetd in GNU Inetutils through 2.7 fails to sanitize the USER environment variable, so a value such as "-f root" is passed as an argument to login …KEVEPSS 99%analysed9.8CVE-2025-39682Linux kernel TLS zero-length record handling flaw on rx_listThe Linux kernel TLS receive path mishandles zero-length records that arrive from the rx_list, breaking the assumption that a record type change cann…KEVEPSS 2.9%analysed

Source: NIST National Vulnerability Database (record CVE-2020-8286), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.