CVE-2026-111497

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2026-10-27. Federal remediation due 2026-11-10.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

55.48% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 99.0% of scored records. A rank, not a probability.

NVD base score

9.2 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS 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/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

NVD analysis status

Undergoing Analysis. NVD last modified this record on 2026-10-28.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-10-22 13:35Z5 DAYS AGO

Last updated

2026-10-28 03:55Z4 HR AGO

Reserved

2026-10-16

Assigning CNA

Google

Record state

PUBLISHED

Severity

Critical (CVSS 9.2)

CNA CVSS 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

Weaknesses

• CWE-252Unchecked Return ValueBase
• CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

94c043f661c0dc068165758588826ea17ff9f8a8cdb458f7914cca1eb2c357b4

• nodejs.orghttps://nodejs.org/en/blog/vulnerability/october-2026-security-releases#nodejs-brotli-decoder-out-of-bounds-write-permits-remote-code-execution-cve-2026-111497---highpatch
• github.comhttps://github.com/andybalholm/brotli/releases/tag/v1.2.7release-notesthird-party-advisory
• ellio.techhttps://ellio.tech/en/blog/node2shell-cve-2026-111497-rce-on-stock-nodejs-builds/third-party-advisory
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-111497government-resource
• github.comhttps://github.com/advisories/GHSA-9v8h-qqgm-4m35
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/10/23/25
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2026/10/msg00049.html
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/10/24/6
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/10/26/12
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/10/26/13
• www.aikido.devhttps://www.aikido.dev/blog/node2shell-nodejs-brotli-rce-cve-2026-111497
• broccoli2shell.comhttps://broccoli2shell.com
• github.comhttps://github.com/dotnet/announcements/issues/494
• github.comhttps://github.com/google/brotli/releases/tag/v1.2.1
• github.comhttps://github.com/google/brotli/releases/tag/v1.1.1
• github.comhttps://github.com/google/brotli/releases/tag/v1.0.10
• patchtheplanet.orghttps://patchtheplanet.org/brotli
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/10/26/16