IDORSSRFAUTH BYPASSJWT FORGERYRACE CONDITIONXXEBROKEN OBJECT-LEVEL AUTHPRIVILEGE ESCALATIONMASS ASSIGNMENTGRAPHQL INTROSPECTION ABUSEIDORSSRFAUTH BYPASSJWT FORGERYRACE CONDITIONXXEBROKEN OBJECT-LEVEL AUTHPRIVILEGE ESCALATIONMASS ASSIGNMENTGRAPHQL INTROSPECTION ABUSE
Impactr Logoimpactr
FeaturesHow it worksEvidencePricingLearnCompare
  1. Home
  2. CWE
  3. CWE-391

CWE-391

Unchecked Error Condition

[PLANNED FOR DEPRECATION. SEE MAINTENANCE NOTES AND CONSIDER CWE-252, CWE-248, OR CWE-1069.] Ignoring exceptions and other error conditions may allow an attacker to induce unexpected behavior unnoticed.

Official CWE-391 definition at MITRE

Impactr finds and proves weaknesses like CWE-391 in your web apps and APIs - investigating, chaining, and validating each with a reproducible exploit.

Join the waitlist
← CWE database
Impactr Logoimpactr

Built by hackers, for the code you ship. Autonomous AI penetration testing for modern web apps and APIs.

© 2026 Impactr

Product

FeaturesCoverageUse casesEvidencePricingWaitlist

Resources

VulnerabilitiesGuidesComparisonsGlossaryCWE databaseBy industryBy languageHTTP status codesSecurity headers

Company

ContactTwitterLinkedInGitHub