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
CVSS score
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EPSS probability
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Risk score
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Published
1 h ago
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
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Evidence confidence
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Short explanation
CallBackery versions before 0.62.0 allow denial of service via the request path interpolated as a regular expression under CGI, FastCGI and PSGI. S0, S1
An unauthenticated attacker can trigger exponential backtracking with a backreference in the path, keeping a worker process busy for minutes. S0, S1
What should be done?
- Follow vendor advisory guidelines
- Check MetaCPAN release changes for update status
Chain of evidence and sources
CallBackery 0.62.0 öncesi sürümler, istek yolunun düzenli ifade olarak işlenmesiyle servis dışı bırakmaya açıktır. S0, S1
CGI, FastCGI ve PSGI altında istemci, hem kalıbı hem de eşleşen dizeyi seçebilir. S0, S1
Yol içindeki bir geri başvuru, üstel geri izlemeye neden olarak bir işçi sürecini dakikalarca meşgul edebilir. S0, S1
Show the technical text from the sources
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.
CWE: CWE-1333
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-118993 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | CPANSec | CallBackery | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| The sources have not yet published a verified CVSS metric. | ||||
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-118993 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-118993 weaknesses.
Official Sources and Advisories
Similar Vulnerabilities
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