CVE-2026-107928

CVSS 8.1 (high) · published 2026-10-20

When curl is built with GnuTLS, a malicious WebSocket server can make curl send memory past its send buffer. This is due to an out of bounds read following when `gnutls_record_send()` returns a number of bytes sent **greater than the number of bytes it was given to send**. GnuTLS does that after a blocked send.

Weakness: CWE-126

Source: NVD CVE-2026-107928

References

• https://curl.se/docs/CVE-2026-107928.html
• https://curl.se/docs/CVE-2026-107928.json
• https://hackerone.com/reports/4099194
• https://hackerone.com/reports/4099194

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