CVE-2026-38427CWE-122

CVE-2026-38427

High · published May 27, 2026

CVSS v3.1
7.3
EPSS
0%
Percentile
36.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.3 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00435 · 36.7th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2026-05-27T18:16Z
References (3)
https://github.com/arendst/Tasmota/blob/c207cc2/tasmota/tasmota_xdrv_driver/xdrv_10_scripter.ino · [email protected]https://github.com/sermikr0/CVE-2026-38427 · [email protected]https://github.com/sermikr0/CVE-2026-38427 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 27 MAY 00:00Z
    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
    cvelistv5