CVE-2026-86522

Description

Improper Output Neutralization for Logs vulnerability in team-alembic AshAuthentication allows an unauthenticated attacker to forge application log entries by submitting a password reset identity containing newlines or control characters. AshAuthentication.Strategy.Password.RequestPasswordReset.run/3 interpolates the identity argument, the email or username taken straight from the reset request, into its Logger.warning/1 heredocs without escaping, truncating or type-restricting it. The resource logged beside it is passed through inspect/1, which would have neutralized the value. A newline in the identity therefore ends the log record, and everything after it is written as a line of its own, so an attacker chooses the severity tag and the content of entries that appear to have come from the application. This issue affects ash_authentication: from 4.2.0 before 4.15.0 and from 5.0.0-rc.0 before 5.0.0-rc.14.

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Weakness Type (CWE)

CWE-117 CWE-117

References

Other References

https://cna.erlef.org/cves/CVE-2026-86522.html https://github.com/team-alembic/ash_authentication/commit/3954f277929712755aef57a4a3a821688f121316 https://github.com/team-alembic/ash_authentication/commit/57c7cc3236bef0fa9da19cb315414f216488866d https://github.com/team-alembic/ash_authentication/commit/fd19358bf0eee53ef13dcf17cc499bd4fb393981 https://github.com/team-alembic/ash_authentication/security/advisories/GHSA-wg7g-r393-vr3g https://osv.dev/vulnerability/EEF-CVE-2026-86522

Frequently Asked Questions

What is CVE-2026-86522? +

Improper Output Neutralization for Logs vulnerability in team-alembic AshAuthentication allows an unauthenticated attacker to forge application log entries by submitting a password reset identity containing newlines or control characters. AshAuthentication.Strategy.Password.RequestPasswordReset.run/3 interpolates the identity argument, the email or username taken straight from the reset request, into its Logger.warning/1 heredocs without escaping, truncating or type-restricting it. The resource logged beside it is passed through inspect/1, which would have neutralized the value. A newline in the identity therefore ends the log record, and everything after it is written as a line of its own, so an attacker chooses the severity tag and the content of entries that appear to have come from the application. This issue affects ash_authentication: from 4.2.0 before 4.15.0 and from 5.0.0-rc.0 before 5.0.0-rc.14.

How do I check if I'm vulnerable to CVE-2026-86522? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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