Unscored severity · published Oct 20, 2026
CVE-2026-107928
info leak uploading over WebSockets with GnuTLS
–
CVSS
0.3%
EPSS
No
On KEV
Description
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CU
curl · curl
8.22.0 through 8.22.0; 8.21.0 through 8.21.0; 8.20.0 through 8.20.0; 8.19.0 through 8.19.0; 8.18.0 through 8.18.0; 8.17.0 through 8.17.0; +31 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-107928
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-107928
curl.se
https://curl.se/docs/CVE-2026-107928.html
curl.se
https://curl.se/docs/CVE-2026-107928.json
hackerone.com
https://hackerone.com/reports/4099194
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