CVE-2026-77358
CVE-2026-77358 · cpp-httplib: Use-after-free of TLS session in WebSocketClient::shutdown_and_close()
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 8.2 · High · EPSS 0.4%
- Published
- Updated
Stack: system
Affected products and versions
cpp-httplib
- Versions
- >= 0.33.0, < 0.50.: Affected
No fix published
cpp-httplib Debian:12
- Versions
- 0.11.4+ds-1
- 0.11.4+ds-1+deb12u1
- 0.11.4+ds-2
- 0.11.4+ds-3
- 0.13.1+ds-1
- 0.14.0+ds-1
- 0.14.1+ds-1
- 0.14.1+ds-2
- 0.14.2+ds-1
- 0.14.3+ds-1
- 0.14.3+ds-1.1
- 0.14.3+ds-1.1~exp1
- 0.15.3+ds-1
- 0.15.3+ds-2
- 0.15.3+ds-3
- 0.16.0+ds-1
- 0.16.3+ds-1
- 0.16.3+ds-2
- 0.18.0+ds-1
- 0.18.7-1
- 0.20.1+ds-3
- 0.25.0+ds-1
- 0.26.0+ds-2
- 0.41.0+ds-1
- 0.41.0+ds-2
- 0.41.0+ds-3
- 0.41.0+ds-3~bpo13+1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
cpp-httplib Debian:13
- Versions
- 0.18.7-1
- 0.18.7-1+deb13u1
- 0.20.1+ds-3
- 0.25.0+ds-1
- 0.26.0+ds-2
- 0.41.0+ds-1
- 0.41.0+ds-2
- 0.41.0+ds-3
- 0.41.0+ds-3~bpo13+1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
cpp-httplib Debian:14
- Versions
- 0.18.7-1
- 0.20.1+ds-3
- 0.25.0+ds-1
- 0.26.0+ds-2
- 0.41.0+ds-1
- 0.41.0+ds-2
- 0.41.0+ds-3
- 0.41.0+ds-3~bpo13+1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
cpp-httplib Ubuntu:Pro:22.04:LTS
- Versions
- 0.9.9+ds-1
- 0.9.10+ds-1
- 0.10.1+ds-1
- 0.10.2+ds-1
- 0.10.3+ds-1
- 0.10.3+ds-1ubuntu0.1~esm1
- 0.10.3+ds-1ubuntu0.1~esm2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
cpp-httplib Ubuntu:Pro:24.04:LTS
- Versions
- 0.13.1+ds-1ubuntu1
- 0.14.3+ds-1
- 0.14.3+ds-1.1
- 0.14.3+ds-1.1build1
- 0.14.3+ds-1.1build2
- 0.14.3+ds-1.1ubuntu0.1~esm1
- 0.14.3+ds-1.1ubuntu0.1~esm2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
cpp-httplib Ubuntu:26.10
- Versions
- 0.26.0+ds-2ubuntu3
- 0.26.0+ds-2ubuntu4
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
cpp-httplib Ubuntu:Pro:26.04:LTS
- Versions
- 0.18.7-1
- 0.26.0+ds-2ubuntu2
- 0.26.0+ds-2ubuntu3
- 0.26.0+ds-2ubuntu3+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published