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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | https://github.com/curl/curl | 7.41.0 to and including 7.73.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | curl | 7.74.0-1 | — |
| Debian 13 | curl | 7.74.0-1 | — |
| Debian 12 | curl | 7.74.0-1 | — |
| Debian 10 | curl | 7.64.0-4+deb10u2 | DSA-4881-1 |
| Debian 9 | curl | 7.52.1-5+deb9u13 | DLA-2500-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | curl | 7.68.0-1ubuntu2.4 | USN-4665-1 |
| Ubuntu 18.04 LTS | curl | 7.58.0-2ubuntu3.12 | USN-4665-1 |
| Ubuntu 16.04 LTS | curl | 7.47.0-1ubuntu2.18 | USN-4665-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | curl +3 | 7.61.1-18.el8 | RHSA-2021:1610 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat JBoss Core Services 1 | jbcs-httpd24 +1 | 1-18.el8jbcs | RHSA-2021:2472 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-apr +1 | 1.6.3-105.el8jbcs | RHSA-2021:2472 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-apr-util +8 | 1.6.1-82.el8jbcs | RHSA-2021:2472 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-brotli +1 | 1.0.6-40.el8jbcs | RHSA-2021:2472 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-curl +2 | 7.77.0-2.el8jbcs | RHSA-2021:2472 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-httpd +6 | 2.4.37-74.el8jbcs | RHSA-2021:2472 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-jansson +1 | 2.11-55.el8jbcs | RHSA-2021:2472 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_cluster-native | 1.3.16-5.Final_redhat_2.el8jbcs | RHSA-2021:2472 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_http2 | 1.15.7-17.el8jbcs | RHSA-2021:2472 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_jk +2 | 1.2.48-16.redhat_1.el8jbcs | RHSA-2021:2472 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_md | 1:2.0.8-36.el8jbcs | RHSA-2021:2472 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_security | 2.9.2-63.GA.el8jbcs | RHSA-2021:2472 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_ssl +1 | 1:2.4.37-74.el8jbcs | RHSA-2021:2472 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-nghttp2 +1 | 1.39.2-37.el8jbcs | RHSA-2021:2472 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-openssl +4 | 1:1.1.1g-6.el8jbcs | RHSA-2021:2472 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-openssl-chil | 1.0.0-5.el8jbcs | RHSA-2021:2472 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-openssl-pkcs11 | 0.4.10-20.el8jbcs | RHSA-2021:2472 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | curl | 7.61.1-18.el8 | RLSA-2021:1610 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | curl | 7.66.0-4.11.1 | SUSE-SU-2020:3735-1 |
| SLES 15 SP1 | curl | 7.60.0-3.35.1 | SUSE-SU-2020:3733-1 |
| SLES 12 SP5 | curl | 7.60.0-11.9.1 | SUSE-SU-2020:3739-1 |
| SLES 12 SP4 | curl | 7.60.0-4.20.1 | SUSE-SU-2021:1786-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | curl | 7.60.0-11.9.1 | SUSE-SU-2020:3739-1 |
| SLES for SAP 12 SP4 | curl | 7.60.0-4.20.1 | SUSE-SU-2021:1786-1 |
| SUSE OpenStack Cloud Crowbar 9 | curl | 7.60.0-4.20.1 | SUSE-SU-2021:1786-1 |
| SUSE OpenStack Cloud 9 | curl | 7.60.0-4.20.1 | SUSE-SU-2021:1786-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | curl | 7.79.1-1.1 | openSUSE-SU-2024:10582-1 |
| openSUSE Leap 15.2 | curl +1 | 7.66.0-lp152.3.12.1 | openSUSE-SU-2020:2238-1 |
| openSUSE Leap 15.1 | curl +1 | 7.60.0-lp151.5.18.1 | openSUSE-SU-2020:2249-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | curl | 7.74.0-r0 | — |
| Alpine v3.23 | curl | 7.74.0-r0 | — |
| Alpine v3.22 | curl | 7.74.0-r0 | — |
| Alpine v3.21 | curl | 7.74.0-r0 | — |
| Alpine v3.20 | curl | 7.74.0-r0 | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | curl | 7.74.0-r0 | — |
| Alpine v3.18 | curl | 7.74.0-r0 | — |
| Alpine v3.17 | curl | 7.74.0-r0 | — |
| Alpine v3.16 | curl | 7.74.0-r0 | — |
| Alpine v3.15 | curl | 7.74.0-r0 | — |
| Alpine v3.14 | curl | 7.74.0-r0 | — |
| Alpine v3.13 | curl | 7.74.0-r0 | — |
| Alpine v3.12 | curl | 7.69.1-r3 | — |
| Alpine v3.11 | curl | 7.67.0-r3 | — |
| Alpine v3.10 | curl | 7.66.0-r3 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | curl +2 | 7.76.1-4.amzn2.0.1 | ALAS2-2021-1693 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | curl +3 | 7.61.1-18.el8 | ELSA-2021-1610 |
Advisories 27
- RHSA-2021:2472 Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.37 SP8 security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2021:1610 Red Hat Security Advisory: curl security and bug fix update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- WID-SEC-2025-0227 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 11, 2026
- WID-SEC-2023-1350 Splunk Splunk Enterprise: Mehrere Schwachstellen in Komponenten von Drittanbietern BSI CERT-Bund (WID) · Jul 1, 2026
- USN-4665-1 curl vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-4881-1 curl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2500-1 curl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2021:1610 Moderate: curl security and bug fix update Rocky Linux Security Advisories · Feb 5, 2026
- openSUSE-SU-2024:10582-1 curl-7.79.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3739-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1786-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:2238-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:2249-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3735-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3733-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2026-0180 Dell Data Protection Advisor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 20, 2026
- WID-SEC-2023-2229 Splunk Splunk Enterprise: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 18, 2025
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- ICSA-22-069-09 Siemens SINEC INS CISA ICS & IT advisories · May 6, 2025
- ICSA-21-159-10 Siemens SIMATIC TIM libcurl CISA ICS & IT advisories · May 6, 2025
- WID-SEC-2023-2098 cURL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 10, 2024
- VDE-2022-019 Endress+Hauser: Multiple products utilizing vulnerable WIBU-SYSTEMS CodeMeter components CERT@VDE · Jun 2, 2022
- SSA-389290 SSA-389290: Third-Party Component Vulnerabilities in SINEC INS Siemens ProductCERT · Mar 8, 2022
- ALAS2-2021-1693 Moderate: curl security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 5, 2021
- SSA-200951 SSA-200951: Multiple Vulnerabilities in Third-Party Component libcurl of TIM Devices Siemens ProductCERT · Jun 8, 2021
- ELSA-2021-1610 Moderate: curl security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 25, 2021
References
- https://hackerone.com/reports/1048457
- https://curl.se/docs/CVE-2020-8286.html
- FEDORA-2020-ceaf490686 vendor-advisory
- [debian-lts-announce] 20201219 [SECURITY] [DLA 2500-1] curl security update mailing-list
- FEDORA-2020-7ab62c73bc vendor-advisory
- GLSA-202012-14 vendor-advisory
- DSA-4881 vendor-advisory
- 20210427 APPLE-SA-2021-04-26-3 Security Update 2021-002 Catalina mailing-list
- 20210427 APPLE-SA-2021-04-26-2 macOS Big Sur 11.3 mailing-list
- 20210427 APPLE-SA-2021-04-26-4 Security Update 2021-003 Mojave mailing-list
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://security.netapp.com/advisory/ntap-20210122-0007/
- https://support.apple.com/kb/HT212325
- https://support.apple.com/kb/HT212326
- https://support.apple.com/kb/HT212327
- https://cert-portal.siemens.com/productcert/pdf/ssa-200951.pdf
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf