Infinite loop Affecting curl package, versions [8.13.0,8.14.1)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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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Test your applications- Snyk IDSNYK-UNMANAGED-CURL-10332636
- published8 Jun 2025
- disclosed7 Jun 2025
- creditz2_
Introduced: 7 Jun 2025
NewCVE-2025-5399 (opens in a new tab)How to fix?
Upgrade curl to version 8.14.1 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 Infinite loop in the function curl_ws_send(), due to a flaw in the handling of WebSocket packets. An attacker can cause the application to enter an endless loop, consuming resources indefinitely by sending a specially crafted packet, a carefully timed PING message while the client is constructing a frame via CURLWS_OFFSET that leads to the next curl_ws_send() invocation not terminating a loop that flushes data.
Note:
The problem does not occur if "auto-pong" is disabled with the CURLWS_NOAUTOPONG option.