CVE-2021-22926: Haxx Curl
High severity, CVSS 7.5. EPSS: 9.8% chance of exploitation in the next 30 days.
libcurl-using applications can ask for a specific client certificate to be used in a transfer. This is done with the `CURLOPT_SSLCERT` option (`--cert` with the command line tool).When libcurl is built to use the macOS native TLS library Secure Transport, an application can ask for the client certificate by name or with a file name - using the same option. If the name exists as a file, it will be used instead of by name.If the appliction runs with a current working directory that is writable by other users (like `/tmp`), a malicious user can create a file name with the same name as the app wants to use by name, and thereby trick the application to use the file based cert instead of the one referred to by name making libcurl send the wrong client certificate in the TLS connection handshake.
Affected products
- Haxx Curl: from 7.33.0, before 7.78.0 (fixed in 7.78.0)
- Netapp Active Iq Unified Manager: affected versions not specified
- Netapp Clustered Data Ontap: affected versions not specified
- Netapp h300e Firmware: affected versions not specified
- Netapp h300s Firmware: affected versions not specified
- Netapp h410s Firmware: affected versions not specified
- Netapp h500e Firmware: affected versions not specified
- Netapp h500s Firmware: affected versions not specified
- Netapp h700e Firmware: affected versions not specified
- Netapp h700s Firmware: affected versions not specified
- Netapp Hci Management Node: affected versions not specified
- Netapp Oncommand Insight: affected versions not specified
- Netapp Oncommand Workflow Automation: affected versions not specified
- Netapp Snapcenter: affected versions not specified
- Netapp Solidfire: affected versions not specified
- Oracle MySQL Server: from 5.7.0, up to and including 5.7.35; from 8.0.0, up to and including 8.0.26
- Oracle PeopleSoft Enterprise PeopleTools: version 8.57 only; version 8.58 only; version 8.59 only
- Siemens Sinec Infrastructure Network Services: before 1.0.1.1 (fixed in 1.0.1.1)
- Splunk Universal Forwarder: from 8.2.0, before 8.2.12 (fixed in 8.2.12); from 9.0.0, before 9.0.6 (fixed in 9.0.6); version 9.1.0 only
Published 2021-08-05. Last modified 2026-06-17.