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CVE-2026-42544

Granian is a Rust HTTP server for Python applications. From 1.2.0 to 2.7.4, Granian aborts a worker process when an unauthenticated client sends a WebSocket upgrade request whose Sec-WebSocket-Protocol header contains non-ASCII bytes. The crash happens in Granian's WebSocket scope construction path, before the ASGI application is invoked. This vulnerability is fixed in 2.7.4.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:779a36717c1494358343f5ec448f499c0be905c243c51f7294168d09c40d6fa9
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 3 assertions

{"cweId":"CWE-248","description":"CWE-248: Uncaught Exception","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:50f9e8feafc0fe2375f68bed01ad711c0c8ee21307a102ad57305c49bf13f164 · sha256:cbd17b3abd3851e7… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:50f9e8feafc0fe2375f68bed01ad711c0c8ee21307a102ad57305c49bf13f164 · sha256:cbd17b3abd3851e7… · /containers/cna/problemTypes/2/descriptions/0

{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:50f9e8feafc0fe2375f68bed01ad711c0c8ee21307a102ad57305c49bf13f164 · sha256:cbd17b3abd3851e7… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"granian","vendor":"emmett-framework","versions":[{"status":"affected","version":">= 1.2.0, < 2.7.4"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:50f9e8feafc0fe2375f68bed01ad711c0c8ee21307a102ad57305c49bf13f164 · sha256:cbd17b3abd3851e7… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:50f9e8feafc0fe2375f68bed01ad711c0c8ee21307a102ad57305c49bf13f164 · sha256:cbd17b3abd3851e7… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

3 source assertions
{"cweId":"CWE-248","description":"CWE-248: Uncaught Exception","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:50f9e8feafc0fe2375f68bed01ad711c0c8ee21307a102ad57305c49bf13f164 · sha256:cbd17b3abd3851e7… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:50f9e8feafc0fe2375f68bed01ad711c0c8ee21307a102ad57305c49bf13f164 · sha256:cbd17b3abd3851e7… · /containers/cna/problemTypes/2/descriptions/0
{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:50f9e8feafc0fe2375f68bed01ad711c0c8ee21307a102ad57305c49bf13f164 · sha256:cbd17b3abd3851e7… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/emmett-framework/granian/security/advisories/GHSA-vrg7-482j-p6f6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:50f9e8feafc0fe2375f68bed01ad711c0c8ee21307a102ad57305c49bf13f164 · sha256:cbd17b3abd3851e7… · /containers/adp/0/references/0
{"name":"https://github.com/emmett-framework/granian/security/advisories/GHSA-vrg7-482j-p6f6","tags":["x_refsource_CONFIRM"],"url":"https://github.com/emmett-framework/granian/security/advisories/GHSA-vrg7-482j-p6f6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:50f9e8feafc0fe2375f68bed01ad711c0c8ee21307a102ad57305c49bf13f164 · sha256:cbd17b3abd3851e7… · /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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