CVE-2026-38427 Integer overflow in n/a
A remote attacker can trigger a heap buffer overflow in Tasmota firmware via integer overflow in JPEG processing, potentially leading to code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-38427?
CVE-2026-38427 is a high-severity vulnerability in n/a, published on 27 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue in fetch_jpg() in xdrv_10_scripter.ino in Tasmota through 15.3.0.3 allows a remote attacker to cause heap buffer overflow. The Content-Length from a JPEG stream is stored in a uint16_t variable; values above 65535 wrap around, causing allocation of a smaller buffer than the data actually read.
Weakness: CWE-122
Which versions are affected by CVE-2026-38427?
How do I fix CVE-2026-38427?
No fix has been published for CVE-2026-38427 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-38427 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-38427 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-cwmx-qwp4-jp5h.