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CVE-2026-42545

Granian is a Rust HTTP server for Python applications. From 0.2.0 to 2.7.4, Granian aborts a worker process if a WSGI application returns an invalid HTTP response header name or value. The WSGI response conversion path uses .unwrap() on both the header name and header value constructors, so malformed output from the application becomes a process abort instead of a handled error. This vulnerability is fixed in 2.7.4.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c7d32391c7224d535df0713cbc294198e05e8b4f5a6a0e7a0f50f6873ed32efc
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-248","description":"CWE-248: Uncaught Exception","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ff3cc69eeedd18f22bc29d9e452c7919072e1c4b9bc03d307db060052e052515 · sha256:ab24e9fd45fdbcdf… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-755","description":"CWE-755: Improper Handling of Exceptional Conditions","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ff3cc69eeedd18f22bc29d9e452c7919072e1c4b9bc03d307db060052e052515 · sha256:ab24e9fd45fdbcdf… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"granian","vendor":"emmett-framework","versions":[{"status":"affected","version":">= 0.2.0, < 2.7.4"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ff3cc69eeedd18f22bc29d9e452c7919072e1c4b9bc03d307db060052e052515 · sha256:ab24e9fd45fdbcdf… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/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:ff3cc69eeedd18f22bc29d9e452c7919072e1c4b9bc03d307db060052e052515 · sha256:ab24e9fd45fdbcdf… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-248","description":"CWE-248: Uncaught Exception","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ff3cc69eeedd18f22bc29d9e452c7919072e1c4b9bc03d307db060052e052515 · sha256:ab24e9fd45fdbcdf… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-755","description":"CWE-755: Improper Handling of Exceptional Conditions","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ff3cc69eeedd18f22bc29d9e452c7919072e1c4b9bc03d307db060052e052515 · sha256:ab24e9fd45fdbcdf… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/emmett-framework/granian/security/advisories/GHSA-f5p7-9fr5-8jmj","tags":["x_refsource_CONFIRM"],"url":"https://github.com/emmett-framework/granian/security/advisories/GHSA-f5p7-9fr5-8jmj"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ff3cc69eeedd18f22bc29d9e452c7919072e1c4b9bc03d307db060052e052515 · sha256:ab24e9fd45fdbcdf… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/emmett-framework/granian/security/advisories/GHSA-f5p7-9fr5-8jmj"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ff3cc69eeedd18f22bc29d9e452c7919072e1c4b9bc03d307db060052e052515 · sha256:ab24e9fd45fdbcdf… · /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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