Improper Authentication Affecting curl package, versions [7.82.0,8.14.2)[8.15.0,8.16.1)[8.17.0,8.20.1)[8.21.0,8.22.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published27 Sept 2026
- disclosed6 Sept 2026
- creditUnknown
Introduced: 6 Sep 2026
CVE-2026-13608 (opens in a new tab)How to fix?
Upgrade curl to version 8.14.2, 8.16.1, 8.20.1, 8.22.0 or higher.
Overview
curl is a command line tool and library for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET and TFTP. libcurl offers a myriad of powerful features.
Affected versions of this package are vulnerable to Improper Authentication via the SASL negotiation process. An attacker can gain unauthorized access by injecting a premature or shortcut response during a Man-in-the-Middle (MITM) attack, causing incomplete peer validation to be misinterpreted as successful authentication.