CVE-2023-42444: Whisperfish Phonenumber

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

phonenumber is a library for parsing, formatting and validating international phone numbers. Prior to versions `0.3.3+8.13.9` and `0.2.5+8.11.3`, the phonenumber parsing code may panic due to a panic-guarded out-of-bounds access on the phonenumber string. In a typical deployment of `rust-phonenumber`, this may get triggered by feeding a maliciously crafted phonenumber over the network, specifically the string `.;phone-context=`. Versions `0.3.3+8.13.9` and `0.2.5+8.11.3` contain a patch for this issue. There are no known workarounds.

Affected products

• Whisperfish Phonenumber: before 0.2.5\+8.11.3 (fixed in 0.2.5\+8.11.3); from 0.3.0\+8.12.9, before 0.3.3\+8.13.9 (fixed in 0.3.3\+8.13.9)

Published 2023-09-19. Last modified 2026-06-17.