curl security

  1. CVE-2026-3784: Curl Proxy Connect Reuse Flaw Fixed in curl 8.19.0

    The curl project disclosed a new vulnerability, tracked as CVE-2026-3784, in which libcurl and the curl command-line tool can wrongly reuse an existing HTTP proxy connection established with one set of proxy credentials when a subsequent request attempts to use different proxy credentials — a...
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    • curl security cve 2026 3784 libcurl proxy authentication
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    • Forum: Security Alerts

  2. CVE-2023-27533: Curl TELNET Input Validation Fix and Patch Guidance

    The curl TELNET input-validation bug tracked as CVE-2023-27533 is a deceptively simple but broadly consequential flaw: curl versions prior to 8.0 accepted unfiltered TELNET username and option strings and forwarded them verbatim into TELNET negotiation, allowing attacker-supplied bytes to be...
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    • curl security input sanitization software patch telnet vulnerability
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    • Forum: Security Alerts