p PatchFirst

CVE-2026-102734

CVE-2026-102734 · asteval sandbox escape: arbitrary native memory read/write via numpy ctypes in default asteval Interpreter

This page contains facts from public vulnerability sources. Check the original advisory before updating.

asteval is a Python expression evaluator designed for restricted execution. Prior to 1.0.9, in asteval/astutils.py, the default Interpreter with numpy enabled exposes a ctypes type and permits from_address memory access. safe_getattr blocks the ctypes module but not reachable ctypes type objects, while attribute assignments use unfiltered setattr instead of safe_setattr. An attacker-controlled expression can derive an address with id, read memory through from_address, and write through an attribute assignment. The expression can read or corrupt arbitrary process memory, escape the intended sandbox, execute code, disclose secrets, or crash the host process. This issue is fixed in version 1.0.9.

CVSS 5.5 · Medium · EPSS 0.1% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • asteval

    Versions
    • < 1.0.9: Affected

    No fix published

  • python-asteval Debian:12

    Versions
    • 0.9.28-1
    • 0.9.30-1
    • 0.9.31-1
    • 1.0.6-1
    • 1.0.6-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-asteval Debian:13

    Versions
    • 1.0.6-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-asteval Debian:14

    Versions
    • 1.0.6-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • asteval PyPI

    Versions
    • 0.9
    • 0.9.1
    • 0.9.10
    • 0.9.11
    • 0.9.12
    • 0.9.13
    • 0.9.14
    • 0.9.15
    • 0.9.16
    • 0.9.17
    • 0.9.18
    • 0.9.19
    • 0.9.2
    • 0.9.20
    • 0.9.21
    • 0.9.22
    • 0.9.23
    • 0.9.24
    • 0.9.25
    • 0.9.26
    • 0.9.27
    • 0.9.28
    • 0.9.29
    • 0.9.3
    • 0.9.30
    • 0.9.31
    • 0.9.32
    • 0.9.33
    • 0.9.4
    • 0.9.5
    • 0.9.6
    • 0.9.7
    • 0.9.8
    • 0.9.9
    • 1.0.0
    • 1.0.1
    • 1.0.2
    • 1.0.3
    • 1.0.4
    • 1.0.5
    • 1.0.6
    • 1.0.7
    • 1.0.8
    Affected ranges
    • ECOSYSTEM: < 1.0.9

    Update to 1.0.9

  • python-asteval Ubuntu:20.04:LTS

    Versions
    • 0.9.12-1
    • 0.9.12-2
    • 0.9.17-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-asteval Ubuntu:22.04:LTS

    Versions
    • 0.9.19-2
    • 0.9.25-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-asteval Ubuntu:24.04:LTS

    Versions
    • 0.9.30-1
    • 0.9.31-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-asteval Ubuntu:26.10

    Versions
    • 1.0.6-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-asteval Ubuntu:26.04:LTS

    Versions
    • 1.0.6-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

Check your server →