CVE-2026-9658
HIGH EPSS 13.2%
Published May 28, 20261mo ago · Modified Jun 17, 20262w ago
7.3 CVSS 3.1
Published May 28, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago
Description
Plack::Middleware::Security::Common versions before 0.13.1 for Perl did not block header injections in request paths. The header injection rule was ineffective at blocking header injections in the request paths unless they were double-encoded, for example, GET /path\r\nHTTP/1.1\r\nHost: secret.example.com Note that it is unclear whether request paths with CRLF followed by additional headers would be blocked by reverse proxies, or how they would be processed by Plack-based servers.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability Low
Threat Intelligence
EPSS Exploit Probability
13.2% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 2
CWE-113
CWE-790
References 2
- openwall.com http://www.openwall.com/lists/oss-security/2026/05/28/9
- metacpan.org https://metacpan.org/release/RRWO/Plack-Middleware-Security-Simple-v0.13.1/changes
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.