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EUVD-2026-188808

fkie_cve-2023-41050

AccessControl provides a general security framework for use in Zope. Python's "format" functionality allows someone controlling the format string to "read" objects accessible (recursively) via attribute access and subscription from accessible objects. Those attribute accesses and subscriptions use Python's full blown `getattr` and `getitem`, not the policy restricted `AccessControl` variants `_getattr_` and `_getitem_`. This can lead to critical information disclosure. `AccessControl` already provides a safe variant for `str.format` and denies access to `string.Formatter`. However, `str.format_map` is still unsafe. Affected are all users who allow untrusted users to create `AccessControl` controlled Python code and execute it. A fix has been introduced in versions 4.4, 5.8 and 6.2. Users are advised to upgrade. There are no known workarounds for this vulnerability.

GHSA-8xv7-89vj-q48c — Information disclosure in AccessControl

Affected: PyPI: AccessControl, PyPI: Zope

### Impact Python's "format" functionality allows someone controlling the format string to "read" objects accessible (recursively) via attribute access and subscription from accessible objects. Those attribute accesses and subscriptions use Python's full blown `getattr` and `getitem`, not the policy restricted `AccessControl` variants `_getattr_` and `_getitem_`. This can lead to critical information disclosure.

`AccessControl` already provides a safe variant for `str.format` and denies access to `string.Formatter`. However, `str.format_map` is still unsafe.

Affected are all users who allow untrusted users to create `AccessControl` controlled Python code and execute it.

### Patches A fix will be introduced in the versions 4.4, 5.8 and 6.2.

### Workarounds There are no workarounds.

### References https://github.com/zopefoundation/RestrictedPython/security/advisories/GHSA-xjw2-6jm9-rf67 describes the corresponding problem for `RestrictedPython`.

gsd-2023-41050

PYSEC-2026-2075 — Information disclosure in AccessControl

Affected: PyPI: zope

`AccessControl` already provides a safe variant for `str.format` and denies access to `string.Formatter`. However, `str.format_map` is still unsafe.

Affected are all users who allow untrusted users to create `AccessControl` controlled Python code and execute it.

### Patches A fix will be introduced in the versions 4.4, 5.8 and 6.2.

### Workarounds There are no workarounds.

### References https://github.com/zopefoundation/RestrictedPython/security/advisories/GHSA-xjw2-6jm9-rf67 describes the corresponding problem for `RestrictedPython`.