CallBackery versions before 0.62.0 for Perl allow denial of service via the request path interpolated as a regular expression under CGI, FastCGI and PSGI.
The before_dispatch hook installed by startup() removes PATH_INFO from the end of the request URI with a substitution that interpolates PATH_INFO unquoted. Under CGI, FastCGI and PSGI both values come from the request, so the client chooses both the pattern and the string it is matched against.
A short unauthenticated request with a backreference in the path backtracks exponentially and can keep a worker process busy for minutes.
The before_dispatch hook installed by startup() removes PATH_INFO from the end of the request URI with a substitution that interpolates PATH_INFO unquoted. Under CGI, FastCGI and PSGI both values come from the request, so the client chooses both the pattern and the string it is matched against.
A short unauthenticated request with a backreference in the path backtracks exponentially and can keep a worker process busy for minutes.
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Advisories
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Fixes
Solution
Upgrade to CallBackery 0.62.0 or later.
Workaround
No workaround given by the vendor.
References
History
Fri, 30 Oct 2026 13:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | CallBackery versions before 0.62.0 for Perl allow denial of service via the request path interpolated as a regular expression under CGI, FastCGI and PSGI. The before_dispatch hook installed by startup() removes PATH_INFO from the end of the request URI with a substitution that interpolates PATH_INFO unquoted. Under CGI, FastCGI and PSGI both values come from the request, so the client chooses both the pattern and the string it is matched against. A short unauthenticated request with a backreference in the path backtracks exponentially and can keep a worker process busy for minutes. | |
| Title | CallBackery versions before 0.62.0 for Perl allow denial of service via the request path interpolated as a regular expression under CGI, FastCGI and PSGI | |
| Weaknesses | CWE-1333 | |
| References |
|
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Status: PUBLISHED
Assigner: CPANSec
Published:
Updated: 2026-10-30T13:11:14.458Z
Reserved: 2026-10-29T10:58:47.286Z
Link: CVE-2026-118993
No data.
Status : Deferred
Published: 2026-10-30T13:18:32.100
Modified: 2026-10-30T17:08:54.633
Link: CVE-2026-118993
No data.
OpenCVE Enrichment
Updated: 2026-10-30T14:30:08Z
Weaknesses