# CVE-2026-35561: Insufficient authentication security controls in browser-based authentication components in Amazon Athena ODBC driver

> Attackers can intercept or hijack authentication sessions in the Amazon Athena ODBC driver due to insufficient browser-based authentication controls.

- **Severity:** Critical 9.1 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Apr 2026
- **Updated:** 20 Oct 2026
- **Also known as:** GHSA-f5vm-7v68-f9ff

## What is CVE-2026-35561?

CVE-2026-35561 is a critical authentication bypass vulnerability in Amazon Athena ODBC driver, published on 3 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Insufficient authentication security controls in the browser-based authentication components in Amazon Athena ODBC driver before 2.1.0.0 might allow a threat actor to intercept or hijack authentication sessions due to insufficient protections in the browser-based authentication flows.

To remediate this issue, users should upgrade to version 2.1.0.0.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-35561?

It affects 1 product.


Products: Amazon Athena Odbc.

## How do I fix CVE-2026-35561?

No fix has been published for CVE-2026-35561 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-35561 being exploited?

There is no known exploitation of CVE-2026-35561 in the wild and no public exploit code.

## Other vulnerabilities in Amazon Athena ODBC driver

- [CVE-2026-35560](https://insights.sbomify.com/CVE-2026-35560/): Improper certificate validation in identity provider connection components in Amazon Athena ODBC driver (critical 9.1)
- [CVE-2026-35562](https://insights.sbomify.com/CVE-2026-35562/): Allocation of resources without limits in parsing components in Amazon Athena ODBC driver (high 8.7)
- [CVE-2026-35558](https://insights.sbomify.com/CVE-2026-35558/): Improper neutralization of special elements in authentication components in Amazon Athena ODBC driver (high 7.3)
- [CVE-2026-5485](https://insights.sbomify.com/CVE-2026-5485/): OS command injection in Amazon Athena ODBC driver on Linux (high 7.3)
- [CVE-2026-35559](https://insights.sbomify.com/CVE-2026-35559/): Out-of-bounds write in query processing components in Amazon Athena ODBC driver (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-35561 and fix it if it is affected.

What it is: CVE-2026-35561 is a critical authentication bypass vulnerability in Amazon Athena ODBC driver, published on 3 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-35561 in the wild and no public exploit code.

Affected product: Amazon Athena ODBC driver. 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-2026-35561/ (Markdown: https://insights.sbomify.com/CVE-2026-35561/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-35561
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-35561
- OSV: https://osv.dev/vulnerability/CVE-2026-35561

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-35561/
Summaries are generated and may contain mistakes; the official description above is the record.