# CVE-2026-12823: Browserbase Skills Autobrowse Trace Artifact default permission

> Local attackers can exploit incorrect default permissions in the Autobrowse Trace Artifact Handler to escalate privileges within the Browserbase Skills library.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Jun 2026
- **Updated:** 3 Jul 2026
- **Also known as:** GHSA-vxfm-r32r-fgx3

## What is CVE-2026-12823?

CVE-2026-12823 is a medium-severity vulnerability in Browserbase Skills, published on 21 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A security flaw has been discovered in Browserbase Skills up to 20260526. This impacts an unknown function of the component Autobrowse Trace Artifact Handler. The manipulation results in incorrect default permissions. The attack requires a local approach. The exploit has been released to the public and may be used for attacks. The first version of the CVE listed Browserbase itself as affected product. This was incorrect as this issue does affect browserbase/skills instead. The vendor was contacted early about this disclosure.

Weakness: CWE-276 (Incorrect Default Permissions), CWE-266 (Incorrect Privilege Assignment)

## Which versions are affected by CVE-2026-12823?


## How do I fix CVE-2026-12823?

No fix has been published for CVE-2026-12823 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-12823 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12823 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-12823 and fix it if it is affected.

What it is: CVE-2026-12823 is a medium-severity vulnerability in Browserbase Skills, published on 21 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-12823 exists.

Affected product: Browserbase Skills. 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-2026-12823/ (Markdown: https://insights.sbomify.com/CVE-2026-12823/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-12823
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-12823
- OSV: https://osv.dev/vulnerability/CVE-2026-12823

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-12823/
Summaries are generated and may contain mistakes; the official description above is the record.