Is CVE-2023-41039 actively exploited?

No active exploitation of CVE-2023-41039 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-41039 be exploited remotely?

Yes. CVE-2023-41039 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-41039?

CVE-2023-41039 has a CVSS score of 7.7 (HIGH).

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HIGH

CVE-2023-41039

CWE-74Published: August 30, 2023· Updated: Jun 17, 2026

7.7

CVSS v3.1

Official Description

RestrictedPython is a restricted execution environment for Python to run untrusted code. Python's "format" functionality allows someone controlling the format string to "read" all objects accessible through recursive attribute lookup and subscription from objects he can access. This can lead to critical information disclosure. With `RestrictedPython`, the format functionality is available via the `format` and `format_map` methods of `str` (and `unicode`) (accessed either via the class or its instances) and via `string.Formatter`. All known versions of `RestrictedPython` are vulnerable. This issue has been addressed in commit `4134aedcff1` which has been included in the 5.4 and 6.2 releases. Users are advised to upgrade. There are no known workarounds for this vulnerability.

NVD Source

Technical Analysis

CVE-2023-41039 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.7.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.