Google Brotli Unchecked Return Value Vulnerability
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.
- Vendor
- Product
- Brotli
- CVSS
- N/A
- EPSS (exploit probability)
- 55.5%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2026-111497 being exploited?
Yes. CISA added CVE-2026-111497 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 55.5% (scored October 27, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-10-28. Full cross-catalog view: /kev-comparison
CVE-2026-111497 timeline
Every event links to its source. Catalog dates are each catalog's own; day offsets count from NVD publication. Data: JSON
What to do
CISA required actionApply 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.
US federal civilian agencies must remediate by (14 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other Google CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2026-106382 Use-after-free in Chromecast allows sandbox code executionwrite-up | [ CRITICAL ] | 9.6 | 0.4% | — |
| CVE-2026-106358 Use-after-free in Chrome Navigation allows sandbox code executionwrite-up | [ CRITICAL ] | 9.6 | 0.6% | — |
| CVE-2026-106347 Use-after-free in Chrome Track component allows sandbox code executionwrite-up | [ HIGH ] | 8.8 | 0.4% | — |
| CVE-2026-106197 Use-after-free in Chrome Browser component enables sandbox RCEwrite-up | [ CRITICAL ] | 9.6 | 0.6% | — |
| CVE-2026-58704 Google Pixel Cellular Modem Improper Authorizationwrite-up | [ HIGH ] | 8.8 | 0.6% | |
| CVE-2026-87491 Google Chromium V8 Out of Bounds Write Vulnerability | [ HIGH ] | 8.8 | 3.5% | |
| CVE-2026-85046 Type confusion in Chrome V8 allows sandbox code executionwrite-up | [ HIGH ] | 8.8 | 1.8% | |
| CVE-2026-15765 Chrome Ozone use-after-freewrite-up | [ HIGH ] | 7.5 | 0.3% | — |