GHSA-pq59-9fq7-m886

Suggest an improvement
Source
https://github.com/advisories/GHSA-pq59-9fq7-m886
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-pq59-9fq7-m886/GHSA-pq59-9fq7-m886.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-pq59-9fq7-m886
Aliases
Published
2026-09-17T16:30:37Z
Modified
2026-09-17T16:45:06Z
Severity
  • 6.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N CVSS Calculator
Summary
Zope AccessControl vulnerable to information disclosure through Python string `format` and `format_map` functions
Details

Impact

Python's string 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.

The AccessControl package already guards against direct access to the formatting functions on string instances, but these mitigations did not cover subclasses of str.

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

Patches

A fix was published with version 7.4.

Workarounds

There is no workaround.

Database specific 
{
    "cwe_ids":  [
        "CWE-693"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-09-17T16:30:37Z",
    "nvd_published_at":  "2026-09-16T15:17:46Z",
    "severity":  "MODERATE"
}
References

Affected packages

PyPI / accesscontrol

Package

Name
accesscontrol
View open source insights on deps.dev
Purl
pkg:pypi/accesscontrol

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
7.4

Affected versions

2.*
2.13.0
2.13.1
2.13.2
2.13.3
2.13.4
2.13.5
2.13.6
2.13.7
2.13.8
2.13.9
2.13.10
2.13.11
2.13.12
2.13.13
2.13.14
2.13.15
2.13.16
3.*
3.0
3.0.1
3.0.2
3.0.3
3.0.4
3.0.5
3.0.6
3.0.7
3.0.8
3.0.9
3.0.10
3.0.11
3.0.12
3.0.13
3.0.14
4.*
4.0a1
4.0a2
4.0a3
4.0a4
4.0a5
4.0a6
4.0a7
4.0b1
4.0b2
4.0b3
4.0b4
4.0b5
4.0b6
4.0b7
4.0
4.1
4.2
4.3
4.4
5.*
5.0
5.1
5.2
5.3
5.3.1
5.4
5.5
5.6
5.7
6.*
6.0
6.1
6.2
6.3
7.*
7.0
7.1
7.2
7.3

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-pq59-9fq7-m886/GHSA-pq59-9fq7-m886.json"