AIKIDO-2025-10856
symfony/security-http is vulnerable to Authentication Bypass by Primary Weakness
72
High Risk
This Affects:
symfony/security-httpTL;DR
Affected versions are vulnerable to a validation bypass in UserBadge identifier normalization. The issue occurs because the UserBadge constructor validates that the identifier is not empty and does not exceed MAX_USERNAME_LENGTH. Still, when using $identifierNormalizer, the normalized identifier is computed lazily in getUserIdentifier() without validation, allowing normalizers to return invalid values. An attacker can exploit this by supplying a custom normalizer that returns an empty string or other invalid identifiers, bypassing the constructor's validation and potentially leading to authentication flaws.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
symfony/security-http is vulnerable to Authentication Bypass by Primary Weakness in versions 7.3.0 - 7.3.7 and 8.0.0 - 8.0.0.
How to fix this
Upgrade the symfony/security-http library to the patch version.
Are You Affected?
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SOC 2Compliant
ISO 27001Compliant