# CVE-2026-66776: Multiple vulnerabilities in SAP Business AI Platform (Approuter)

> An attacker can bypass session integrity checks to access another user's session context, compromising confidentiality.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Aug 2026
- **Updated:** 11 Aug 2026
- **Also known as:** GHSA-2x68-8jqv-5gp3

## What is CVE-2026-66776?

CVE-2026-66776 is a medium-severity authentication bypass vulnerability in SAP_SE SAP Business AI Platform (Approuter), published on 11 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

SAP Approuter does not consistently enforce integrity verification on certain session-related request headers under specific conditions. An attacker with low privileges could send a specially crafted request that bypasses the integrity check and loads another user's session context. Successful exploitation requires the attacker to have previously observed matching session values out-of-band, which makes the attack complex to execute. This could result in a high impact on confidentiality and a low impact on integrity. There is no impact on availability.

Weakness: CWE-347 (Improper Verification of Cryptographic Signature)

## Which versions are affected by CVE-2026-66776?

It affects 1 product.


Products: Sap Approuter.

## How do I fix CVE-2026-66776?

No fix has been published for CVE-2026-66776 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-66776 being exploited?

There is no known exploitation of CVE-2026-66776 in the wild and no public exploit code.

## Other vulnerabilities in SAP_SE SAP Business AI Platform (Approuter)

- [CVE-2026-27690](https://insights.sbomify.com/CVE-2026-27690/): HTTP Request Smuggling in SAP Approuter (critical 9.1)
- [CVE-2026-44745](https://insights.sbomify.com/CVE-2026-44745/): Open Redirect vulnerability in SAP Approuter (high 8.1)
- [CVE-2026-58230](https://insights.sbomify.com/CVE-2026-58230/): Multiple vulnerabilities in SAP Business AI Platform (Approuter) (high 7.0)
- [CVE-2026-66760](https://insights.sbomify.com/CVE-2026-66760/): Multiple vulnerabilities in SAP Business AI Platform (Approuter) (medium 6.4)
- [CVE-2026-58237](https://insights.sbomify.com/CVE-2026-58237/): Multiple vulnerabilities in SAP Business AI Platform (Approuter) (medium 5.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-66776 and fix it if it is affected.

What it is: CVE-2026-66776 is a medium-severity authentication bypass vulnerability in SAP_SE SAP Business AI Platform (Approuter), published on 11 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-66776 in the wild and no public exploit code.

Affected product: SAP_SE SAP Business AI Platform (Approuter). 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-2026-66776/ (Markdown: https://insights.sbomify.com/CVE-2026-66776/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-66776
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-66776
- OSV: https://osv.dev/vulnerability/CVE-2026-66776

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-66776/
Summaries are generated and may contain mistakes; the official description above is the record.