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CVE-2026-46430

Algernon is a small self-contained pure-Go web server. Prior to 1.17.7, the SSE event server bound to 0.0.0.0:5553 on Linux/macOS by default because the platform-dependent host default in engine/flags.go:39-46 set host = "" for non-Windows, and utils.JoinHostPort("", ":5553") resolves to ":5553". This vulnerability is fixed in 1.17.7.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:732128458b4af11ca851b12eb0188aa8c1222dfe420b3f792f12fb67ce12fa3d
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-1188","description":"CWE-1188: Insecure Default Initialization of Resource","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9471f9a7bcb6118be7b7318e4f080fc46cfd5c9baf66ec3bdd3b145ab9b90d09 · sha256:5bc3f67767a6b8ee… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-668","description":"CWE-668: Exposure of Resource to Wrong Sphere","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9471f9a7bcb6118be7b7318e4f080fc46cfd5c9baf66ec3bdd3b145ab9b90d09 · sha256:5bc3f67767a6b8ee… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"algernon","vendor":"xyproto","versions":[{"status":"affected","version":"< 1.17.7"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9471f9a7bcb6118be7b7318e4f080fc46cfd5c9baf66ec3bdd3b145ab9b90d09 · sha256:5bc3f67767a6b8ee… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9471f9a7bcb6118be7b7318e4f080fc46cfd5c9baf66ec3bdd3b145ab9b90d09 · sha256:5bc3f67767a6b8ee… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-1188","description":"CWE-1188: Insecure Default Initialization of Resource","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9471f9a7bcb6118be7b7318e4f080fc46cfd5c9baf66ec3bdd3b145ab9b90d09 · sha256:5bc3f67767a6b8ee… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-668","description":"CWE-668: Exposure of Resource to Wrong Sphere","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9471f9a7bcb6118be7b7318e4f080fc46cfd5c9baf66ec3bdd3b145ab9b90d09 · sha256:5bc3f67767a6b8ee… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/xyproto/algernon/security/advisories/GHSA-gj84-924c-48fx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/xyproto/algernon/security/advisories/GHSA-gj84-924c-48fx"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9471f9a7bcb6118be7b7318e4f080fc46cfd5c9baf66ec3bdd3b145ab9b90d09 · sha256:5bc3f67767a6b8ee… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/xyproto/algernon/security/advisories/GHSA-gj84-924c-48fx"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9471f9a7bcb6118be7b7318e4f080fc46cfd5c9baf66ec3bdd3b145ab9b90d09 · sha256:5bc3f67767a6b8ee… · /containers/adp/0/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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