CVE-2026-3446

Aliases:UBUNTU-CVE-2026-3446DEBIAN-CVE-2026-3446RHSA-2026:60511CGA-6hp8-5q8f-q525CGA-9fxg-hh2h-5ccrCGA-g32q-4xf3-638mCGA-2jh8-9rgw-gvrmCGA-q28f-52m2-hg5pCGA-rx76-gpxc-p8gfCGA-rxmx-jmpf-x496CGA-vcp8-74m9-69ff
Advisory lineage Upstream: 0 Downstream: 19
Awaiting Analysis
Published: 10 Apr 2026, 18:17
Last modified:13 Apr 2026, 16:07

Vulnerability Summary

Overall Risk (default)
low
24/100
CVSS Score
6 MEDIUM
v4.0 (cve.org)
EPSS Score
0.19% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

10 Apr 2026, 18:17
Published
Vulnerability first disclosed
13 Apr 2026, 16:07
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v4.0•MEDIUM•Score: 6CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
  • v4.0•MEDIUM•Score: 6CVSS: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
  • v3.1•MEDIUM•Score: 5.3CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS Trends

Current EPSS score: 0.19%• Percentile: 9%

Techniques & Countermeasures

  • CWE-345•Insufficient Verification of Data Authenticity

    The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

Affected Systems

  • chainguard•python-3.10

    all

  • chainguard•python-3.11

    all

  • chainguard•python-3.12

    all

  • chainguard•python-3.9

    all

  • wolfi•python-3.10

    all

  • wolfi•python-3.11

    all

  • wolfi•python-3.12

    all

  • debian•python2.7

    all

  • debian•python3.11

    all

  • debian•python3.13

    < 3.13.5-2+deb13u2 | < 3.13.14-1

  • debian•python3.14

    < 3.14.4-1

  • debian•python3.9

    all

  • ubuntu•pypy3

    all | all | all | all | all

  • ubuntu•python2.7

    all

  • ubuntu•python3.10

    all

  • ubuntu•python3.11

    all | all

  • ubuntu•python3.12

    all

  • ubuntu•python3.13

    all

  • ubuntu•python3.14

    all

  • ubuntu•python3.4

    all

  • ubuntu•python3.5

    all

  • ubuntu•python3.6

    all

  • ubuntu•python3.7

    all

  • ubuntu•python3.8

    all

  • ubuntu•python3.9

    all

  • python software foundation•cpython

    < 3.13.13 | ≥ 3.14.0, < 3.14.4 | ≥ 3.15.0a1, < 3.15.0a8

  • redhat•python3.11

    < 0:3.11.16-1.1.hum1

References (18)