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VulnerabilityPublished

CVE-2026-125729: Plack::Middleware::CSP versions before 0.03 for Perl send the Content Security Policy under the

Source GCVE Database

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Authoritative record:CVE-2026-125729· High

Not known to be exploited : upgrade to 0.03 soon.

Data as of 10 Nov 2026, 19:32 UTC

Severity
High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in 0.03

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 10 Nov 2026.

What to do

Upgrade Plack-Middleware-CSP (Perl module) to 0.03.

Affected software

ProductAffectedFixed in
Plack-Middleware-CSPAffected
  • <0.03
Fixed in
  • 0.03
CPANPlack-Middleware-CSPpkg:cpan/Plack-Middleware-CSPOther threatsAffected
  • <0.03
Fixed in
  • 0.03

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade to Plack::Middleware::CSP version 0.03 or later where the header name is correctly set to "Content-Security-Policy". No other mitigation is indicated by the available data.

Description

Plack::Middleware::CSP versions before 0.03 for Perl incorrectly send the Content Security Policy using the header name "content-security-protocol" instead of the correct "Content-Security-Policy" header. As a result, browsers do not enforce the intended security policy, potentially allowing cross-site scripting (XSS) attacks to execute scripts that the policy was meant to block.

References

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