CVE-2026-57278 GeoVision GeoWebPlayer Websocket Server connectInfo handler stack-based buffer overflow vulnerability
A stack-based buffer overflow in the GeoWebPlayer websocket server allows attackers to execute arbitrary code via crafted JSON input.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-57278?
CVE-2026-57278 is a high-severity memory corruption vulnerability in GeoVision Inc. GeoWebPlayer, published on 2 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
GeoWebPlayer (also called "Web Plugin" in the GV-VMS documentation and "WS Player" for VMS-Cloud) is an addon that can be installed with various GeoVision software (GV-VMS, GV-Cloud, ...). It creates a websocket server that expands the capabilities of the various web-interfaces provided by the GeoVision software and may be necessary for them to function properly.
The Websocket server can accept various commands coming from localhost. One of them, `connectionInfo` is meant to provide the necessary details to connect to a camera. The handler associated with this command that we call`handle_connection_info` contains multiple instances of string copy that can overflow. The function `handle_connect_info` copies attacker-controlled JSON strings into fixed-size buffers using manual byte-by-byte loops that do not enforce length limits.
#### Buffer Overflow in ip field
Weakness: CWE-120
Which versions are affected by CVE-2026-57278?
How do I fix CVE-2026-57278?
No fix has been published for CVE-2026-57278 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-57278 being exploited?
There is no known exploitation of CVE-2026-57278 in the wild and no public exploit code.
Sources
Also known as GHSA-cpch-mrj6-mv2v.