CVE-2026-71274 OpenBK7231T Stored XSS via Unsanitized MQTT-Set Channel Labels
Attackers can inject malicious scripts via MQTT channel labels, leading to stored XSS in the web interface of OpenBK7231T devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-71274?
CVE-2026-71274 is a high-severity cross-site scripting vulnerability in openshwprojects OpenBK7231T_App, published on 5 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
OpenBK7231T's CHANNEL_SetLabel (src/cmnds/cmd_channels.c) stores channel labels received via the MQTT SetChannelLabel command using strdup with no HTML sanitization. CHANNEL_GetLabel returns these labels unsanitized, and they are rendered via hprintf255 at 15+ locations in src/httpserver/http_fns.c with no HTML encoding.
Weakness: CWE-79
Which versions are affected by CVE-2026-71274?
How do I fix CVE-2026-71274?
No fix has been published for CVE-2026-71274 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-71274 being exploited?
There is no known exploitation of CVE-2026-71274 in the wild and no public exploit code.
Sources
Also known as GHSA-9c86-c5c2-55cr.