CVE-2026-63626
Mongoose is an embedded web server and network library.
Impact
Mongoose is an embedded web server and network library. Prior to 7.23, ppp_handle_ipv6cp() in src/l2_ppp.c trusts the 16-bit IPv6CP len field without checking it against the received payload size. On a PPP or PPPoE link using MG_ENABLE_TCPIP and MG_ENABLE_IPV6, an unauthenticated adjacent peer can complete the required LCP exchange and send a short Configure-Request with an oversized length, causing ppp_tx_frame() to read beyond recv_queue.buf and write beyond tx.buf. The same length misuse can also expose adjacent heap bytes in a reply or hang the event loop through find_opt(). This issue is fixed in version 7.23.
Affected products
| Product | Affected versions |
|---|---|
| Mongoose Is An Embedded Web Server And Network Library. | before 7.23 |
Versions were read from the advisory text. No structured product data has been published for this record yet.