CVE-2026-3446
Published: April 14, 2026Last modified: April 22, 2026
Description
When calling base64.b64decode() or related functions the decoding process would stop after encountering the first padded quad regardless of whether there was more information to be processed. This can lead to data being accepted which may be processed differently by other implementations. Use "validate=True" to enable stricter processing of base64 data.
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | python3 | Unknown (3.11.3-r0) |
| 25 LTS | python3 | Unknown (3.12.10-r1) | |
| Stream | python3 | Fixed (3.14.3-r1) | |
| Hardened Containers | 23 LTS | python3 | Unknown (3.11.3-r0) |
| 25 LTS | python3 | Unknown (3.12.10-r1) | |
| Stream | python3 | Fixed (3.14.3-r1) |
References
- https://github.com/python/cpython/commit/1f9958f909c1b41a4ffc0b613ef8ec8fa5e7c474
- https://github.com/python/cpython/commit/4561f6418a691b3e89aef0901f53fe0dfb7f7c0e
- https://github.com/python/cpython/commit/e31c55121620189a0d1a07b689762d8ca9c1b7fa
- https://github.com/python/cpython/issues/145264
- https://github.com/python/cpython/pull/145267
- https://mail.python.org/archives/list/[email protected]/thread/F5ZT5ICGJ6CKXVUJ34YBVY7WOZ5SHG53/