CVE-2026-3446
EPSS 0.03%Base64 decoding stops at first padded quad by default
發布日:2026/4/10修改日:2026/5/16
描述
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.
受影響套件(9)
- Bitnami/libpythonfrom 0, < 3.13.13, >= 3.14.0, < 3.14.4
- Bitnami/pythonfrom 0, < 3.13.13, >= 3.14.0, < 3.14.4
- Bitnami/python-minfrom 0, < 3.13.13, >= 3.14.0, < 3.14.4
- Debian/pypy3from 0
- Debian/python2.7from 0
- Debian/python3.11from 0
- Debian/python3.13from 0, < 3.13.5-2+deb13u2
- Debian/python3.14from 0, < 3.14.4-1
- Debian/python3.9from 0
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/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 |
參考連結(8)
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-3446
- WEBhttps://github.com/python/cpython/commit/1f9958f909c1b41a4ffc0b613ef8ec8fa5e7c474
- WEBhttps://github.com/python/cpython/commit/4561f6418a691b3e89aef0901f53fe0dfb7f7c0e
- WEBhttps://github.com/python/cpython/commit/e31c55121620189a0d1a07b689762d8ca9c1b7fa
- WEBhttps://github.com/python/cpython/issues/145264
- WEBhttps://github.com/python/cpython/pull/145267
- WEBhttps://mail.python.org/archives/list/[email protected]/thread/F5ZT5ICGJ6CKXVUJ34YBVY7WOZ5SHG53/
- WEBhttps://nvd.nist.gov/vuln/detail/CVE-2026-3446