CVE-2026-25506CWE-787

MUNGE has a buffer overflow in message unpacking allows key leakage and credential forgery

High · published February 10, 2026

CVSS v3.1
7.7
EPSS
0%
Percentile
22.3
In the wild
Unconfirmed
What it is

⚡ A buffer overflow in MUNGE could let a local attacker impersonate any user, even root! 😱 Think of MUNGE like a secure post office that verifies identities before delivering packages. This vulnerability is like a sneaky delivery person who can alter the address labels to receive packages meant for anyone, including the VIPs! With the leaked cryptographic key material, an attacker could forge credentials and gain access to sensitive services, potentially leading to a catastrophic breach of trust and security. Impersonating the root user means they could do anything — from reading confidential information to wreaking havoc on the entire system. This is absolutely devastating!

Put simply

Think of MUNGE like a secure post office that verifies identities before delivering packages. This vulnerability is like a sneaky delivery person who can alter the address labels to receive packages meant for anyone, including the VIPs! This vulnerability allows a local attacker to exploit a buffer overflow by sending a specially crafted message with an oversized address length field, corrupting the MUNGE daemon's internal state and enabling access to critical MAC subkeys used for credential verification.

What to do

With the leaked cryptographic key material, an attacker could forge credentials and gain access to sensitive services, potentially leading to a catastrophic breach of trust and security. Impersonating the root user means they could do anything — from reading confidential information to wreaking havoc on the entire system. This is absolutely devastating! Immediately upgrade to MUNGE version 0.5.18 to patch this vulnerability. Additionally, review user access logs for any suspicious activities and implement strict access controls to minimize local attack vectors. You've got this! Just follow these steps, and you'll have MUNGE secured in no time! 🛡️

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00307 · 22.3th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-02-10T18:55Z
EPSS history
Timeline
  • 10 FEB 18:55Z
    MUNGE has a buffer overflow in message unpacking allows key leakage and credential forgery
    cvelistv5