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Permalink CVE-2026-62947

4.9 MEDIUM

CVSS version (CVSS): 3.1
Attack Vector (AV): Network (N)
Attack Complexity (AC): Low (L)
Privileges Required (PR): High (H)
User Interaction (UI): None (N)
Scope (S): Unchanged (U)
Confidentiality (C): High (H)
Integrity (I): None (N)
Availability (A): None (N)
Modified Attack Vector (MAV): Network (N)
Modified Attack Complexity (MAC): Low (L)
Modified Privileges Required (MPR): High (H)
Modified User Interaction (MUI): None (N)
Modified Confidentiality (MC): High (H)
Modified Scope (MS): Unchanged (U)
Modified Integrity (MI): None (N)
Modified Availability (MA): None (N)

created 21 hours ago Activity log

Created suggestion 21 hours ago

OpenWrt: ACL bypass and arbitrary root file read via cgi-io cgi-download

OpenWrt is a Linux operating system targeting embedded devices. Prior to 25.12.5, the cgi-download handler in cgi-io authorizes the requested path against the caller's ubus session file ACL before canonicalization, and rpcd session.c uses fnmatch() without FNM_PATHNAME, allowing traversal such as an allowed wildcard prefix followed by ../ to read root-readable files including /etc/shadow. This vulnerability is fixed in 25.12.5.

References

https://github.com/openwrt/openwrt/security/advisories/GHSA-jw5r-xhf5-2xcq x_refsource_CONFIRMexploit
https://github.com/openwrt/cgi-io/pull/4 x_refsource_MISC
https://github.com/openwrt/cgi-io/commit/72990b7489872112df31c94032637c907760bae4 x_refsource_MISC
https://github.com/openwrt/openwrt/releases/tag/v25.12.5 x_refsource_MISC

Affected products

openwrt

==< 25.12.5

Matching in nixpkgs

pkgs.terraform-providers.openwrt

None

nixos-unstable 0.0.20
- nixpkgs-unstable 0.0.20
nixos-26.05 0.0.20
- nixos-26.05-small 0.0.20
- nixpkgs-26.05-darwin 0.0.20

pkgs.python313Packages.openwrt-luci-rpc

Python module for interacting with the OpenWrt Luci RPC interface

nixos-unstable 1.1.17
- nixpkgs-unstable 1.1.17
- nixos-unstable-small 1.1.17
nixos-26.05 1.1.17
- nixos-26.05-small 1.1.17
- nixpkgs-26.05-darwin 1.1.17

pkgs.python313Packages.openwrt-ubus-rpc

Python API for OpenWrt ubus RPC

nixos-unstable 0.0.3
- nixpkgs-unstable 0.0.3
- nixos-unstable-small 0.0.3
nixos-26.05 0.0.3
- nixos-26.05-small 0.0.3
- nixpkgs-26.05-darwin 0.0.3

pkgs.python314Packages.openwrt-luci-rpc

Python module for interacting with the OpenWrt Luci RPC interface

nixos-unstable 1.1.17
- nixpkgs-unstable 1.1.17
- nixos-unstable-small 1.1.17
nixos-26.05 1.1.17
- nixos-26.05-small 1.1.17
- nixpkgs-26.05-darwin 1.1.17

pkgs.python314Packages.openwrt-ubus-rpc

Python API for OpenWrt ubus RPC

nixos-unstable 0.0.3
- nixpkgs-unstable 0.0.3
- nixos-unstable-small 0.0.3
nixos-26.05 0.0.3
- nixos-26.05-small 0.0.3
- nixpkgs-26.05-darwin 0.0.3

pkgs.terraform-providers.joneshf_openwrt

None

nixos-unstable 0.0.20
- nixpkgs-unstable 0.0.20
- nixos-unstable-small 0.0.20
nixos-26.05 0.0.20
- nixos-26.05-small 0.0.20
- nixpkgs-26.05-darwin 0.0.20

Package maintainers

@matt-snider Matt Snider <matt.snider@protonmail.com>
@fabaff Fabian Affolter <mail@fabian-affolter.ch>

Permalink CVE-2026-55490

6.5 MEDIUM

CVSS version (CVSS): 3.1
Attack Vector (AV): Adjacent (A)
Attack Complexity (AC): Low (L)
Privileges Required (PR): None (N)
User Interaction (UI): None (N)
Scope (S): Unchanged (U)
Confidentiality (C): None (N)
Integrity (I): None (N)
Availability (A): High (H)
Modified Attack Vector (MAV): Adjacent (A)
Modified Attack Complexity (MAC): Low (L)
Modified Privileges Required (MPR): None (N)
Modified User Interaction (MUI): None (N)
Modified Confidentiality (MC): None (N)
Modified Scope (MS): Unchanged (U)
Modified Integrity (MI): None (N)
Modified Availability (MA): High (H)

created 1 week, 2 days ago Activity log

Created suggestion 1 week, 2 days ago

OpenWrt: EAD Integer Underflow → Pre-Auth Denial of Service

OpenWrt is a Linux operating system targeting embedded devices. Before v25.12.5, an integer underflow in handle_send_a() of the Emergency Access Daemon allows any unauthenticated attacker on the local network to crash the daemon by sending a single crafted UDP packet. The message length underflows before a bounds check and is then passed to memcpy as a very large size. This issue is fixed v25.12.5.