CVE-2026-77358

cpp-httplib is a C++ header-only HTTP/HTTPS library. In versions 0.33.0 through 0.50.0, the TLS-enabled WebSocket client frees the TLS session before closing the WebSocket that still uses it, producing a use-after-free. In WebSocketClient::shutdown_and_close the SSL object is freed and the pointer cleared, but the subsequent WebSocket close still sends a close frame through the SSL socket stream, which holds a raw copy of the now-dangling session pointer and reads from and writes to the freed memory. The same freed-then-used ordering is reachable through the client's destructor and its connect path, so ordinary teardown of a secure WebSocket connection triggers the defect. This issue is fixed in version 0.50.1.

CVSS

No CVSS.

References

Link	Resource
https://github.com/yhirose/cpp-httplib/commit/2f986fd5e56e7c5f686d965174516360930f371d
https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-w7p7-f35j-mw7q
https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-w7p7-f35j-mw7q

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-28 00:18

Updated : 2026-09-09 21:09

NVD link : CVE-2026-77358

Mitre link : CVE-2026-77358

CVE.ORG link : CVE-2026-77358

JSON object : View

Products Affected

No product.

CWE

CWE-416

Use After Free

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