CVE-2026-111497
Publication date 23 October 2026
Last updated 26 October 2026
Ubuntu priority
Description
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| brotli | 26.10 stonking |
Fixed in 1.2.0-4ubuntu0.1
|
| 26.04 LTS resolute |
Fixed in 1.2.0-3ubuntu0.1
|
|
| 24.04 LTS noble |
Fixed in 1.1.0-2ubuntu0.1
|
|
| 22.04 LTS jammy |
Fixed in 1.0.9-2ubuntu0.1
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
|
| nodejs | 26.10 stonking |
Not affected
|
| 26.04 LTS resolute |
Not affected
|
|
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy |
Not affected
|
|
| 20.04 LTS focal |
Vulnerable
|
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty |
Not affected
|
Notes
mdeslaur
nodejs on jammy and higher uses the system brotli, marking as not-affected nodejs on focal uses the vendored brotli nodejs in bionic and earlier doesn't use brotli at all
Severity score breakdown
CVSS version: CVSS v4.0
Base score
9.2 · Critical
Vector: 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
References
Related Ubuntu Security Notices (USN)
- USN-8956-1
- Brotli vulnerability
- 26 October 2026