Exploited vulnerabilities / CVE-2026-111497
Confirmed exploited · remote code execution · Google BrotliCVE-2026-111497
Google Brotli remote code execution, confirmed exploited in the wild.
Google Brotli contains an unchecked return value vulnerability that 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.
| CISA's name for it | Google Brotli Unchecked Return Value Vulnerability |
|---|---|
| Vendor and product | Google · Brotli |
| Type | remote code execution · CWE-252, CWE-787 |
| Exploited | Confirmed by CISA listed 27 October 2026 |
| Likelihood | one of the most likely to be exploited of every vulnerability tracked |
| Deadline | 10 November 2026 · already passed |
| Used in ransomware | Not reported |
| Advisories | github.com ↗ · www.cisa.gov ↗ · www.cisa.gov ↗ · nvd.nist.gov ↗ |
Three steps, in this order
Patch to the fixed version the vendor names, today if the product faces the internet.
Until it is patched, take the affected service off the internet or put it behind a VPN or allow-list.
Look for signs it was already used: new accounts, web shells, unexpected processes and outbound connections since the date it was listed.
| CISA's required action | Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. |
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Know before someone else finds it
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CVE-2026-111497 in short
Is CVE-2026-111497 being exploited?
Yes. CISA added CVE-2026-111497 to its Known Exploited Vulnerabilities catalogue on 27 October 2026, which it does only on evidence of exploitation in the wild.
What is the CISA deadline for CVE-2026-111497?
US federal agencies must remediate it by 10 November 2026. Everyone else should treat that date as the latest safe point to patch an internet-facing system.
How likely is CVE-2026-111497 to be exploited in the next 30 days?
FIRST's Exploit Prediction Scoring System gives it 83%, the 99th percentile of every CVE it scores.
How do I fix CVE-2026-111497?
Patch to the fixed version the vendor names, today if the product faces the internet. Until it is patched, take the affected service off the internet or put it behind a VPN or allow-list. Look for signs it was already used: new accounts, web shells, unexpected processes and outbound connections since the date it was listed.
Other Google vulnerabilities being exploited
| CVE | Product | Type | Listed |
|---|---|---|---|
| CVE-2026-125350 | Chromium | remote code execution | 10 November 2026 |
| CVE-2026-58704 | Pixel | privilege escalation | 16 September 2026 |
| CVE-2026-87491 | Chromium V8 | remote code execution | 9 September 2026 |
| CVE-2026-85046 | Chromium V8 | remote code execution | 4 September 2026 |
| CVE-2026-11645 | Chromium V8 | remote code execution | 9 June 2026 |
| CVE-2026-5281 | Dawn | remote code execution | 1 April 2026 |
Sources: CISA Known Exploited Vulnerabilities catalogue (released 10 November 2026) and FIRST EPSS. Page compiled automatically by SAK T.L.M, the threat-intelligence tool of SAK T.E.C, on 13 November 2026.