busybox: busybox: httpd silently fails open when IP deny rules contain invalid CIDR prefix lengths

BusyBox httpd IP deny rules with invalid CIDR prefix lengths fail open, leaving a parsed IP with a zeroed mask so the rule matches no clients...

SUSE CVE-2026-88831

BusyBox httpd IP deny rules with invalid CIDR prefix lengths fail open, leaving a parsed IP with a zeroed mask so the rule matches no clients...

AZL-105131 CVE-2026-88831 affecting package busybox 1.36.1-27

BusyBox httpd IP deny rules with invalid CIDR prefix lengths fail open, leaving a parsed IP with a zeroed mask so the rule matches no clients...

DEBIAN-CVE-2026-88831

BusyBox httpd IP deny rules with invalid CIDR prefix lengths fail open, leaving a parsed IP with a zeroed mask so the rule matches no clients...

CVE-2026-88831

BusyBox httpd IP deny rules with invalid CIDR prefix lengths fail open, leaving a parsed IP with a zeroed mask so the rule matches no clients...

CVE-2026-88831

BusyBox httpd IP deny rules with invalid CIDR prefix lengths fail open, leaving a parsed IP with a zeroed mask so the rule matches no clients...

UBUNTU-CVE-2026-88831

BusyBox httpd IP deny rules with invalid CIDR prefix lengths fail open, leaving a parsed IP with a zeroed mask so the rule matches no clients...

CVE-2026-88831 Busybox: busybox: httpd silently fails open when ip deny rules contain invalid cidr prefix lengths

BusyBox httpd IP deny rules with invalid CIDR prefix lengths fail open, leaving a parsed IP with a zeroed mask so the rule matches no clients...

EUVD-2026-85509

BusyBox httpd IP deny rules with invalid CIDR prefix lengths fail open, leaving a parsed IP with a zeroed mask so the rule matches no clients...

CVE-2026-88831

The BusyBox httpd component is vulnerable to a security bypass where IP deny rules with invalid CIDR prefix lengths fail open. The system leaves a parsed IP with a zeroed mask, causing the rule to match no clients and allowing potentially unauthorized access. To mitigate this, users should audit ...

CVE-2026-88831 Busybox: busybox: httpd silently fails open when ip deny rules contain invalid cidr prefix lengths

BusyBox httpd IP deny rules with invalid CIDR prefix lengths fail open, leaving a parsed IP with a zeroed mask so the rule matches no clients...

CVE-2026-88831

BusyBox httpd IP deny rules with invalid CIDR prefix lengths fail open, leaving a parsed IP with a zeroed mask so the rule matches no clients...

CVE-2026-88831

BusyBox httpd IP deny rules with invalid CIDR prefix lengths fail open, leaving a parsed IP with a zeroed mask so the rule matches no clients. Mitigation Audit all BusyBox httpd configuration files for syntactically valid CIDR prefix lengths. Implement network-level access controls...

CVE-2026-88831: Not Failing Securely

BusyBox httpd IP deny rules with invalid CIDR prefix lengths fail open, leaving a parsed IP with a zeroed mask so the rule matches no clients...

PT-2026-97426

Name of the Vulnerable Software and Affected Versions BusyBox versions prior to 1.38.0-3.1 Description The httpd component in BusyBox handles IP deny rules incorrectly when invalid CIDR prefix lengths are provided. This causes the system to fail open, resulting in a parsed IP with a zeroed mask,...

CVE-2026-72597 Friendica Friendica - Server-Side Request Forgery

A server-side request forgery vulnerability in Friendica through the 2026.08-dev branch allows authenticated users with a free self-registered account to probe internal network services via the link-preview endpoint. The endpoint fetches any user-supplied URL without applying an internal IP deny...

GHSA-J5H6-VQC3-PHQH Directus: SSRF Protection Bypass via 0.0.0.0 in File Import

Summary The SSRF protection on Directus's file-import-from-URL feature can be bypassed using the address 0.0.0.0. While 127.0.0.1 and other internal addresses are denied, 0.0.0.0 is not added to the blocklist. On Linux and macOS, connecting to 0.0.0.0 reaches localhost, so an authenticated user...

CVE-2026-55187

Mailpit is an email testing tool and API for developers. Prior to 1.30.2, the remediation shipped for CVE-2026-27808 is incomplete because the tools.IsInternalIP deny-list in internal/tools/net.go relies on Go's standard library classification helpers and does not block IPv6 transition mechanisms...

CVE-2007-2765

blockhosts.py in BlockHosts before 2.0.3 does not properly parse daemon log files, which allows remote attackers to add arbitrary deny entries to the /etc/hosts.allow file and cause a denial of service by adding arbitrary IP addresses to a daemon log file, as demonstrated by logging in through ss...