# CVE-2026-85692: Nightingale 9.1.1 SSRF Guard Bypass via IPv6 Encoding

> Attackers can bypass SSRF guards in Nightingale's AI-agent tool by using specific IPv6 encodings to access internal services or cloud metadata.

- **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA: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:** 4 Sep 2026
- **Updated:** 4 Sep 2026
- **Also known as:** GHSA-wc5f-hgwx-ffx9

## What is CVE-2026-85692?

CVE-2026-85692 is a high-severity server-side request forgery vulnerability in ccfos nightingale, published on 4 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Nightingale (n9e), as of commit 8362cbe (main branch, confirmed 2026-08-27), contains a server-side request forgery vulnerability in the isPublicIP function in aiagent/tools/http.go, the SSRF guard for the http_fetch AI-agent tool. The function only unwraps standard IPv4-mapped (::ffff:a.b.c.d) IPv6 addresses before checking them against the forbidden-range list, and does not classify 6to4 (2002::/16), NAT64 (64:ff9b::/96, 64:ff9b:1::/48), or deprecated site-local (fec0::/10) addresses. On a dual-stack or NAT64-enabled host, an attacker able to supply a URL to the http_fetch tool can bypass the guard by encoding a forbidden IPv4 address (such as the cloud instance-metadata endpoint 169.254.169.254) in one of these IPv6 forms to reach internal or metadata services.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-85692?


## How do I fix CVE-2026-85692?

No fix has been published for CVE-2026-85692 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-85692 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85692 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-85692 and fix it if it is affected.

What it is: CVE-2026-85692 is a high-severity server-side request forgery vulnerability in ccfos nightingale, published on 4 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85692 exists.

Affected product: ccfos nightingale. 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-2026-85692/ (Markdown: https://insights.sbomify.com/CVE-2026-85692/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-85692
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-85692
- OSV: https://osv.dev/vulnerability/CVE-2026-85692

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-85692/
Summaries are generated and may contain mistakes; the official description above is the record.