CVE Explorer

CVE-2026-13577

Dancer2 versions through 2.1.0 for Perl generate insecure session ids when required CSPRNG modules are unavailable. Dancer2::Core::Role::SessionFactory::generate_id silently falls back to a built-in rand-derived session id unless both Math::Random::ISAAC::XS and Crypt::URandom are available. The fallback session id is generated from a SHA-1 hash of a call to the built-in rand function, the absolute path of the Dancer2::Core::Role::SessionFactory module, an internal counter, the process id, the

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:5c5a16a36abbb8dfe74df2217988bf2d67b500c863b7b39c50b758edf5deccd7

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-340","description":"CWE-340 Generation of Predictable Numbers or Identifiers","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:389caa1884e1e937f034f56d74e8187cc6f5a8d61099c395d0eff8c3631e629c · sha256:6a3baa055b0e4599… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-338","description":"CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:389caa1884e1e937f034f56d74e8187cc6f5a8d61099c395d0eff8c3631e629c · sha256:6a3baa055b0e4599… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion

{"collectionURL":"https://cpan.org/modules","defaultStatus":"unaffected","packageName":"Dancer2","product":"Dancer2","programFiles":["lib/Dancer2/Core/Role/SessionFactory.pm"],"programRoutines":[{"name":"Dancer2::Core::Role::SessionFactory::generate_id"}],"repo":"https://github.com/PerlDancer/Dancer2","vendor":"CROMEDOME","versions":[{"lessThanOrEqual":"2.1.0","status":"affected","version":"0","versionType":"custom"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:389caa1884e1e937f034f56d74e8187cc6f5a8d61099c395d0eff8c3631e629c · sha256:6a3baa055b0e4599… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:389caa1884e1e937f034f56d74e8187cc6f5a8d61099c395d0eff8c3631e629c · sha256:6a3baa055b0e4599… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions

{"cweId":"CWE-340","description":"CWE-340 Generation of Predictable Numbers or Identifiers","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:389caa1884e1e937f034f56d74e8187cc6f5a8d61099c395d0eff8c3631e629c · sha256:6a3baa055b0e4599… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-338","description":"CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:389caa1884e1e937f034f56d74e8187cc6f5a8d61099c395d0eff8c3631e629c · sha256:6a3baa055b0e4599… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions

{"url":"https://github.com/PerlDancer/Dancer2/blob/v2.1.0/lib/Dancer2/Core/Role/SessionFactory.pm#L142"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:389caa1884e1e937f034f56d74e8187cc6f5a8d61099c395d0eff8c3631e629c · sha256:6a3baa055b0e4599… · /containers/cna/references/0

{"tags":["related"],"url":"https://www.cve.org/CVERecord?id=CVE-2026-5080"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:389caa1884e1e937f034f56d74e8187cc6f5a8d61099c395d0eff8c3631e629c · sha256:6a3baa055b0e4599… · /containers/cna/references/1

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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