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CVE-2026-9658

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4b25e7c1564787819606fc4e38e2fbf5535119a60a3c36275f10ec1a557665db
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-113","description":"CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:682ebb9d947016d50a8fcff119b8d9c62b4e72668a0a865c465522d2f257fa11 · sha256:3307c986879e2476… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-790","description":"CWE-790 Improper Filtering of Special Elements","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:682ebb9d947016d50a8fcff119b8d9c62b4e72668a0a865c465522d2f257fa11 · sha256:3307c986879e2476… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"collectionURL":"https://cpan.org/modules","defaultStatus":"unaffected","packageName":"Plack-Middleware-Security-Simple","product":"Plack::Middleware::Security::Common","programFiles":["lib/Plack/Middleware/Security/Common.pm"],"programRoutines":[{"name":"Plack::Middleware::Security::Common::header_injection"}],"repo":"https://github.com/robrwo/Plack-Middleware-Security-Simple","vendor":"RRWO","versions":[{"lessThan":"0.13.1","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:682ebb9d947016d50a8fcff119b8d9c62b4e72668a0a865c465522d2f257fa11 · sha256:3307c986879e2476… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.3,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:682ebb9d947016d50a8fcff119b8d9c62b4e72668a0a865c465522d2f257fa11 · sha256:3307c986879e2476… · /containers/adp/1/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-113","description":"CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:682ebb9d947016d50a8fcff119b8d9c62b4e72668a0a865c465522d2f257fa11 · sha256:3307c986879e2476… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-790","description":"CWE-790 Improper Filtering of Special Elements","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:682ebb9d947016d50a8fcff119b8d9c62b4e72668a0a865c465522d2f257fa11 · sha256:3307c986879e2476… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/05/28/9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:682ebb9d947016d50a8fcff119b8d9c62b4e72668a0a865c465522d2f257fa11 · sha256:3307c986879e2476… · /containers/adp/0/references/0
{"tags":["release-notes"],"url":"https://metacpan.org/release/RRWO/Plack-Middleware-Security-Simple-v0.13.1/changes"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:682ebb9d947016d50a8fcff119b8d9c62b4e72668a0a865c465522d2f257fa11 · sha256:3307c986879e2476… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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