CVE-2026-38427
High
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.
SeverityHigh
CVSS7.3
Exploit probability—
ProductTasmota
PublishedMay 27, 2026
First seenMay 27, 2026
Weakness typeCWE-122CWE-122
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Tasmota | v ≤ 15.3.0.3 | — |
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