# GO-2026-6216: Cross-forge account takeover on login in codefloe.com/crowci/crow/v6

> Attackers can take over arbitrary user accounts by exploiting forge ID collisions during login on multi-forge instances.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 18 Aug 2026

## What is GO-2026-6216?

GO-2026-6216 is an authentication bypass vulnerability in codefloe.com/crowci/crow/v6, published on 18 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

In codefloe.com/crowci/crow/v6 before 6.4.0, user account lookup during forge login is not scoped to the authenticating forge. An account on one forge matches an existing user on another forge via forge remote ID collision or username collision. On instances with multiple configured forges, an attacker can take over arbitrary Crow accounts by registering matching credentials on any connected forge.

## Which versions are affected by GO-2026-6216?

1 open source package ship an affected version, including codefloe.com/crowci/crow/v6.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `codefloe.com/crowci/crow/v6` | Go | All versions | 6.4.0 |

## How do I fix GO-2026-6216?

Upgrade codefloe.com/crowci/crow/v6 to 6.4.0 or later.

## Is GO-2026-6216 being exploited?

There is no known exploitation of GO-2026-6216 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GO-2026-6216 and fix it if it is affected.

What it is: GO-2026-6216 is an authentication bypass vulnerability in codefloe.com/crowci/crow/v6, published on 18 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 GO-2026-6216 in the wild and no public exploit code.

Affected packages and fixed versions:
- codefloe.com/crowci/crow/v6 (Go): affected all versions; fixed in 6.4.0

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/GO-2026-6216/ (Markdown: https://insights.sbomify.com/GO-2026-6216/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GO-2026-6216

---
From sbomify Insights: https://insights.sbomify.com/GO-2026-6216/
Summaries are generated and may contain mistakes; the official description above is the record.