--- title: "CVE-2026-111497: Out-of-Bounds Write in Google Brotli… | CubePath" 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…" language: en source: https://cubepath.com/security/cve/CVE-2026-111497 --- # CVE-2026-111497: Out-of-Bounds Write in Google Brotli… | CubePath 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. Official description from the CVE record, published by Google. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-111497) ## Key data CVSS 4.0 Critical 9.2 Score published by Google in the CVE record. 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 | Metric | Value | What it means | | ----------------------------------- | ------- | --------------------------------------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No measurable action is needed to get around the system's built-in security controls. The attack is repeatable. | | Attack requirements | Present | The attack depends on certain deployment or execution conditions being present. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Vulnerable system: confidentiality | High | Serious or total effect on the secrecy of data. | | Vulnerable system: integrity | High | Serious or total effect on the trustworthiness of data. | | Vulnerable system: availability | High | Serious or total effect on availability. | | Subsequent systems: confidentiality | None | No effect on other systems' data secrecy. | | Subsequent systems: integrity | None | No effect on other systems' data trustworthiness. | | Subsequent systems: availability | None | No effect on other systems' availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.82641 (82.6% probability) Percentile 99.7% Scores of Nov 10, 2026 Model v2026.06.15 CISA Known Exploited Vulnerabilities This CVE is listed in the CISA KEV catalog. Name in the catalog Google Brotli Unchecked Return Value Vulnerability Added to the catalog Oct 27, 2026 Federal due date Nov 10, 2026 CISA assessment as of Oct 23, 2026 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Recorded by CISA as active Automatable no Technical impact total Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-787](https://cwe.mitre.org/data/definitions/787.html) Out-of-bounds Write - [CWE-252](https://cwe.mitre.org/data/definitions/252.html) Unchecked Return Value Affected products Products listed in the CVE record, as the CNA published them. - Google Brotli - affected: 1.0.3 up to before 1.0.10 - affected: 1.1.0 up to before 1.1.1 - affected: 1.2.0 up to before 1.2.1 References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [nodejs.org](https://nodejs.org/en/blog/vulnerability/october-2026-security-releases#nodejs-brotli-decoder-out-of-bounds-write-permits-remote-code-execution-cve-2026-111497---high) patch - [github.com](https://github.com/andybalholm/brotli/releases/tag/v1.2.7) release-notes third-party-advisory - [github.com](https://github.com/advisories/GHSA-9v8h-qqgm-4m35) - [openwall.com](http://www.openwall.com/lists/oss-security/2026/10/23/25) - [lists.debian.org](https://lists.debian.org/debian-lts-announce/2026/10/msg00049.html) - [openwall.com](http://www.openwall.com/lists/oss-security/2026/10/24/6) - [openwall.com](http://www.openwall.com/lists/oss-security/2026/10/26/12) - [openwall.com](http://www.openwall.com/lists/oss-security/2026/10/26/13) - [aikido.dev](https://www.aikido.dev/blog/node2shell-nodejs-brotli-rce-cve-2026-111497) - [broccoli2shell.com](https://broccoli2shell.com) - [github.com](https://github.com/dotnet/announcements/issues/494) - [github.com](https://github.com/google/brotli/releases/tag/v1.2.1) - [github.com](https://github.com/google/brotli/releases/tag/v1.1.1) - [github.com](https://github.com/google/brotli/releases/tag/v1.0.10) - [patchtheplanet.org](https://patchtheplanet.org/brotli) - [openwall.com](http://www.openwall.com/lists/oss-security/2026/10/26/16) - [openwall.com](http://www.openwall.com/lists/oss-security/2026/11/03/2) Timeline 1. ID reserved Oct 16, 2026 2. Record published Oct 22, 2026 3. Added to CISA KEV Oct 27, 2026 4. Record last updated Nov 10, 2026 ## Look up another CVE About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:07 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)