CallBackery versions before 0.62.0 for Perl allow denial of service via the request path interpolated as a regular
Source GCVE Database
Not known to be exploited : upgrade to 0.62.0 soon.
Data as of 30 Oct 2026, 17:03 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or none- Patch
- Available – fixed in 0.62.0
Exploitation evidence
Disclosed: evidence found.
CVE published 30 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade CallBackery (Perl module) to 0.62.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| CallBackery | Affected
| Fixed in
|
CPANCallBackerypkg:cpan/CallBackeryOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
If you cannot patch yet, consider mitigating by restricting or validating request paths to prevent malicious patterns if possible.
Description
CallBackery versions before 0.62.0 for Perl contain a denial of service vulnerability due to unsafe interpolation of the request path as a regular expression under CGI, FastCGI, and PSGI environments. This allows an unauthenticated attacker to craft a request path with backreferences that causes exponential backtracking, potentially keeping a worker process busy for minutes.