Libvncserver

This hub aggregates every CVE we track for Libvncserver, a product in the oss libraries space. Use it to gauge the current risk picture and drill into individual advisories.

Severity distribution

Monthly trend

The 15 most recently published vulnerabilities affecting Libvncserver.

• CVE-2026-44988LibVNCClient Tight Gradient decoding allows malicious server-triggered heap/stack OOB writes8.8May 27, 2026
• CVE-2026-32854LibVNCServer httpd proxy NULL Pointer Dereference7.5Mar 24, 2026
• CVE-2026-32853LibVNCServer UltraZip Encoding Heap Out-of-bounds Read8.1Mar 24, 2026
• CVE-2019-15690LibVNCServer 0.9.12 release and earlier contains heap buffer overflow vulnerability within the HandleCursorShape() function in libvncclient/cursor.c. An attacker sends cursor shapes with specially ...8.8Jan 24, 2025
• CVE-2020-29260libvncclient v0.9.13 was discovered to contain a memory leak via the function rfbClientCleanup().7.5Sep 2, 2022
• CVE-2020-25708A divide by zero issue was found to occur in libvncserver-0.9.12. A malicious client could use this flaw to send a specially crafted message that, when processed by the VNC server, would lead to a ...7.5Nov 27, 2020
• CVE-2017-18922It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this by sending specially crafted WebSocket ...9.8Jun 30, 2020
• CVE-2020-14396An issue was discovered in LibVNCServer before 0.9.13. libvncclient/tls_openssl.c has a NULL pointer dereference.7.5Jun 17, 2020
• CVE-2020-14397An issue was discovered in LibVNCServer before 0.9.13. libvncserver/rfbregion.c has a NULL pointer dereference.7.5Jun 17, 2020
• CVE-2020-14398An issue was discovered in LibVNCServer before 0.9.13. An improperly closed TCP connection causes an infinite loop in libvncclient/sockets.c.7.5Jun 17, 2020
• CVE-2020-14399An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c. NOTE: there is reportedly "no trust boundary crossed.7.5Jun 17, 2020
• CVE-2020-14400An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint16_t pointers in libvncserver/translate.c. NOTE: Third parties do not consider this to be a vulnerab...7.5Jun 17, 2020
• CVE-2020-14401An issue was discovered in LibVNCServer before 0.9.13. libvncserver/scale.c has a pixel_value integer overflow.6.5Jun 17, 2020
• CVE-2020-14402An issue was discovered in LibVNCServer before 0.9.13. libvncserver/corre.c allows out-of-bounds access via encodings.5.4Jun 17, 2020
• CVE-2020-14403An issue was discovered in LibVNCServer before 0.9.13. libvncserver/hextile.c allows out-of-bounds access via encodings.5.4Jun 17, 2020