MediumFix available

stringprep.map_table_b2() deviates from RFC 3454 Table B.2

Type: advisorySource: OSV1 source record

The "stringprep" module didn't process characters from RFC 3454 tables B.2 or B.3 correctly: the latest Unicode codepoint attributes were used instead of the specified Unicode 3.2.0. This behavior would cause mismatches when processing domain names using IDNA 2003 (the "idna" codec) and the in_table_b2() function of the "stringprep" module. This only affects domain names containing characters that were not previously registered or had their Unicode attributes such as case-folding behavior updated since Unicode 3.2.0.

Announced 11 Sept 2026Group revision 1

Original source ↗

BIT-python-2026-17084

Primary source · Revision 2

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:BIT-python-2026-17084

python

Source reference: /affected/0/package/name

Affected versions: Not stated in this record
Fixed versions: 3.10.22
Source reference: /affected/0/ranges
3.11.17
Source reference: /affected/0/ranges
3.12.15
Source reference: /affected/0/ranges
3.13.16
Source reference: /affected/0/ranges
3.14.8
Source reference: /affected/0/ranges
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "SEMVER",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.10.22"
          },
          {
            "introduced": "3.11.0"
          },
          {
            "fixed": "3.11.17"
          },
          {
            "introduced": "3.12.0"
          },
          {
            "fixed": "3.12.15"
          },
          {
            "introduced": "3.13.0"
          },
          {
            "fixed": "3.13.16"
          },
          {
            "introduced": "3.14.0"
          },
          {
            "fixed": "3.14.8"
          }
        ]
      }
    ],
    "package": {
      "name": "python",
      "purl": "pkg:bitnami/python",
      "ecosystem": "Bitnami"
    },
    "severity": [
      {
        "type": "CVSS_V4",
        "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
      }
    ],
    "database_specific": {
      "source": "https://github.com/bitnami/vulndb/tree/main/data/python/BIT-python-2026-17084.json"
    }
  }
]