CVE-2026-3446 Base64 decoding stops at first padded quad by default

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...

CVE-2026-3446

CVE-2026-3446 affects Python’s base64 decoding (base64.b64decode and related functions). The root cause is that the decoder stops after the first padded quad, potentially leaving additional data unprocessed. This can cause data to be accepted and then processed differently by other implementation...

CVE-2026-3446 Base64 decoding stops at first padded quad by default

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...

CVE-2026-3446

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...

PSF-2026-16

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...

CVE-2026-3446

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...

PT-2026-32017

Name of the Vulnerable Software and Affected Versions Base64 affected versions not specified Description The decoding process using base64.b64decode or related functions would halt upon encountering the first padded quad, even if additional data remained. This could result in the acceptance of da...