CVE-2026-111497
Critical9.2Out-of-Bounds Write in Google Brotli Decodertitle from the CVE record
A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms allows a remote unauthenticated attacker to corrupt adjacent decoder state memory, disclose sensitive memory contents, cause a denial of service, or potentially execute arbitrary code using a crafted Brotli-compressed stream. Users need to update any Brotli libraries or binaries between 1.0.3 through 1.2.0 to the latest available version: 1.0.10 or 1.1.1 or 1.2.1.
- CVSS
- 9.2v4.0
- EPSS (exploit probability)
- Unavailable
- CISA KEV
- Not listed
EPSS trendFIRST daily scores, last 90 days
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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Why it happened and what stops it
The weakness (CWE)
How attackers use it (ATT&CK)
Typical for this kind of weakness across CISA KEV exploits (CTID), not specific to this CVE.
How it's exploited
What the attacker gets
Controls that mitigate it (NIST SP 800-53)
- SI-4System MonitoringSystem and Information Integrity · mitigates 8 of these techniques
- AC-6Least PrivilegeAccess Control · mitigates 6 of these techniques
- CM-6Configuration SettingsConfiguration Management · mitigates 6 of these techniques
- SI-3Malicious Code ProtectionSystem and Information Integrity · mitigates 6 of these techniques
- CA-7Continuous MonitoringSecurity Assessment and Authorization · mitigates 5 of these techniques
- CM-8System Component InventoryConfiguration Management · mitigates 5 of these techniques