Description
Meshtastic is an open source mesh networking solution. Prior to v2.6.3, an attacker can send NodeInfo with a empty publicKey first, then overwrite it with a new key. First sending a empty key bypasses 'if (p.public_key.size > 0) {', clearing the existing publicKey (and resetting the size to 0) for a known node. Then a new key bypasses 'if (info->user.public_key.size > 0) {', and this malicious key is stored in NodeDB. This vulnerability is fixed in 2.6.3.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_confirm
https://github.com/meshtastic/firmware/security/advisories/GHSA-95pq-gj5v-4fg2
Issue Tracking, Patch x_refsource_misc
https://github.com/meshtastic/firmware/pull/6372
Scores
CVSS v3
9.4
EPSS
0.0040
EPSS Percentile
31.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-287
Status
published
Products (1)
meshtastic/meshtastic_firmware
< 2.6.3
Published
Aug 18, 2025
Tracked Since
Feb 18, 2026