SB20260831108 - Input validation error in ip-address

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Main Vulnerability Database SB20260831108

SB20260831108 - Input validation error in ip-address

Published: August 31, 2026

Security Bulletin ID SB20260831108
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Input validation error (CVE-ID: CVE-2026-54272)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to bypass SSRF and trust-boundary checks.

The vulnerability exists due to improper input validation in Address6 special-property checks when processing IPv4-mapped or NAT64 IPv6 addresses. A remote attacker can supply a crafted IPv6 literal that embeds an internal IPv4 destination to bypass SSRF and trust-boundary checks.

For NAT64 addresses, end-to-end reachability additionally requires a NAT64/DNS64 gateway in the deployment network.


Remediation

Install update from vendor's website.

References