Path To Regexp
Monthly
The path-to-regexp library versions 8.0.0 through 8.3.0 suffer from catastrophic regular expression denial of service via exponential regex generation when route patterns contain multiple sequential optional groups in curly-brace syntax. Remote unauthenticated attackers can trigger resource exhaustion by submitting crafted route patterns, causing application-level denial of service with CVSS 7.5 (High severity). No public exploit identified at time of analysis, and the vendor has released version 8.4.0 to address the issue.
Catastrophic backtracking in path-to-regexp versions prior to 0.1.13 enables remote denial of service attacks through specially crafted URLs containing three or more parameters within a single route segment separated by non-period characters. The vulnerability stems from insufficient backtrack protection in regex generation for routes like /:a-:b-:c, allowing unauthenticated attackers to trigger exponential computation times. SSVC framework confirms the vulnerability is automatable with partial technical impact, though no public exploit is identified at time of analysis.
path-to-regexp versions prior to 8.4.0 are vulnerable to Regular Expression Denial of Service (ReDoS) when processing multiple wildcard parameters combined with path parameters in specific configurations. Unauthenticated remote attackers can craft malicious path patterns containing multiple wildcards (not at the end) to trigger catastrophic regex backtracking, causing denial of service against applications using the affected library. No public exploit code or active exploitation has been confirmed at time of analysis.
The path-to-regexp library versions 8.0.0 through 8.3.0 suffer from catastrophic regular expression denial of service via exponential regex generation when route patterns contain multiple sequential optional groups in curly-brace syntax. Remote unauthenticated attackers can trigger resource exhaustion by submitting crafted route patterns, causing application-level denial of service with CVSS 7.5 (High severity). No public exploit identified at time of analysis, and the vendor has released version 8.4.0 to address the issue.
Catastrophic backtracking in path-to-regexp versions prior to 0.1.13 enables remote denial of service attacks through specially crafted URLs containing three or more parameters within a single route segment separated by non-period characters. The vulnerability stems from insufficient backtrack protection in regex generation for routes like /:a-:b-:c, allowing unauthenticated attackers to trigger exponential computation times. SSVC framework confirms the vulnerability is automatable with partial technical impact, though no public exploit is identified at time of analysis.
path-to-regexp versions prior to 8.4.0 are vulnerable to Regular Expression Denial of Service (ReDoS) when processing multiple wildcard parameters combined with path parameters in specific configurations. Unauthenticated remote attackers can craft malicious path patterns containing multiple wildcards (not at the end) to trigger catastrophic regex backtracking, causing denial of service against applications using the affected library. No public exploit code or active exploitation has been confirmed at time of analysis.