libcurl vulnerabilities and fixes

Q: How do I fix libcurl vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Q: Is libcurl being exploited right now?

None of the tracked libcurl CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Q: Which libcurl CVE should I patch first?

CVE-2023-27536 currently ranks highest (55/100): An authentication bypass vulnerability exists libcurl <8.0.0 in the connection reuse feature which can reuse p.

Recent CVEs affecting libcurl, with upgrade or downgrade steps. 2 tracked.

libcurl has 2 tracked vulnerabilities, 0 critical. A fixed release or vendor patch exists for 2. Most recent: 2023-03-30. Highest priority: CVE-2023-27536 (score 55/100).

CVE-2023-27536 MEDIUM 5.9 UPGRADE MITIGATE An authentication bypass vulnerability exists libcurl <8.0.0 in the connection reuse feature which can reuse p
CVE-2023-27537 MEDIUM 5.9 DOWNGRADE MITIGATE A double free vulnerability exists in libcurl <8.0.0 when sharing HSTS data between separate "handles"

FAQ

How do I fix libcurl vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is libcurl being exploited right now?

None of the tracked libcurl CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which libcurl CVE should I patch first?

CVE-2023-27536 currently ranks highest (55/100): An authentication bypass vulnerability exists libcurl <8.0.0 in the connection reuse feature which can reuse p.

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