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Vulnerability record · public intelligence
CVE-2021-22926
HIGH

CURLOPT_SSLCERT mix-up with Secure Transport

Published Aug 5, 2021 · Updated Oct 23, 2026 · Also known as CURL-CVE-2021-22926

Severity · CVSSHIGH · 7.5
Known exploitationNot listed
EPSS / likelihood15.14%
QFinch risk score10 / 100

Original summary

Normalized public record · Updated Oct 23, 2026

CURLOPT_SSLCERT mix-up with Secure Transport

Publisher and source text is retained separately from QFinch interpretation.

QFinch assessment

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).

Evidence: public source records

Affected products

Affected scope reported by the available public evidence
Affected package, product or rangeFix status
Consult the referenced vendor advisory for affected versions.Consult source advisory

Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.

Remediation

Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.

  1. Confirm the affected product and reachable code path exist in your environment.
  2. Apply the vendor-supported patch or mitigation from the primary advisory.
  3. Rescan the exact deployed revision and retain verification evidence.
Review primary references

Evidence coverage

CVENVDOSVEPSS
SSVC priority
MEDIUM
Confidence
10%
Aliases
CURL-CVE-2021-22926

Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.

Sources and record history

  1. hackerone.com ↗
  2. [kafka-dev] 20210831 Security vulnerabilities in kafka:2.13-2.6.0/2.7.0 docker image ↗
  3. [kafka-users] 20210831 Security vulnerabilities in kafka:2.13-2.6.0/2.7.0 docker image ↗
  4. [kafka-users] 20210901 Re: [EXTERNAL] Re: Security vulnerabilities in kafka:2.13-2.6.0/2.7.0 docker image ↗
  5. [kafka-dev] 20210901 Re: [EXTERNAL] Re: Security vulnerabilities in kafka:2.13-2.6.0/2.7.0 docker image ↗
  6. www.oracle.com ↗
  7. security.netapp.com ↗
  8. www.oracle.com ↗
  9. security.netapp.com ↗
  10. cert-portal.siemens.com ↗
  11. GLSA-202212-01 ↗
  12. cert-portal.siemens.com ↗

Record history

Published Aug 5, 2021 · Last refreshed Oct 23, 2026