# CVE-2026-87539: Information disclosure in Chrome

> Remote attackers can obtain cross-origin data via crafted HTML pages due to observable network discrepancies in Google Chrome.

- **Severity:** Low 3.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 9 Sep 2026
- **Updated:** 9 Sep 2026
- **Also known as:** DEBIAN-CVE-2026-87539, ECHO-e7b2-ff20-1bcb, GHSA-6g56-3875-jfjp, MINI-pp87-hv8m-7rxg

## What is CVE-2026-87539?

CVE-2026-87539 is a low-severity vulnerability in Google Chrome, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Observable discrepancy in Network in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to obtain cross-origin data via a crafted HTML page. (Chromium security severity: Medium)

Weakness: CWE-203 (Observable Discrepancy)

## Which versions are affected by CVE-2026-87539?

It affects 1 product.


Products: Google Chrome.

## How do I fix CVE-2026-87539?

Upgrade to a fixed version.

## Is CVE-2026-87539 being exploited?

There is no known exploitation of CVE-2026-87539 in the wild and no public exploit code.

## Other vulnerabilities in Google Chrome

- [CVE-2022-4135](https://insights.sbomify.com/CVE-2022-4135/): Google Chromium GPU Heap Buffer Overflow (critical 9.6, exploited in the wild)
- [CVE-2020-16017](https://insights.sbomify.com/CVE-2020-16017/): Google Chrome Use-After-Free (critical 9.6, exploited in the wild)
- [CVE-2020-16010](https://insights.sbomify.com/CVE-2020-16010/): Google Chrome for Android UI Heap Buffer Overflow (critical 9.6, exploited in the wild)
- [CVE-2026-87491](https://insights.sbomify.com/CVE-2026-87491/): Google Chromium V8 Out of Bounds Write (high 8.8, exploited in the wild)
- [CVE-2026-85046](https://insights.sbomify.com/CVE-2026-85046/): Google Chromium V8 Type Confusion (high 8.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-87539 and fix it if it is affected.

What it is: CVE-2026-87539 is a low-severity vulnerability in Google Chrome, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-87539 in the wild and no public exploit code.

Affected product: Google Chrome. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-87539/ (Markdown: https://insights.sbomify.com/CVE-2026-87539/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-87539
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-87539
- OSV: https://osv.dev/vulnerability/CVE-2026-87539

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-87539/
Summaries are generated and may contain mistakes; the official description above is the record.