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CVE-2026-34826

Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Utils.get_byte_ranges parses the HTTP Range header without limiting the number of individual byte ranges. Although the existing fix for CVE-2024-26141 rejects ranges whose total byte coverage exceeds the file size, it does not restrict the count of ranges. An attacker can supply many small overlapping ranges such as 0-0,0-0,0-0,... to trigger disproportionate CPU, memory, I/O, and bandwidth consumptio
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d31db4043bcaaf645d9f55c969bb12ac60b12c98a8d6b2ebe848da626fb76ee3
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-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2bc13081bd3e6eeab883f74c5ef289a0bbefe2b3d8a775c2c0ba6bff37c5d14c · sha256:ef1a9d97b2dfad09… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2bc13081bd3e6eeab883f74c5ef289a0bbefe2b3d8a775c2c0ba6bff37c5d14c · sha256:ef1a9d97b2dfad09… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"rack","vendor":"rack","versions":[{"status":"affected","version":"< 2.2.23"},{"status":"affected","version":">= 3.0.0.beta1, < 3.1.21"},{"status":"affected","version":">= 3.2.0, < 3.2.6"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2bc13081bd3e6eeab883f74c5ef289a0bbefe2b3d8a775c2c0ba6bff37c5d14c · sha256:ef1a9d97b2dfad09… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","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:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2bc13081bd3e6eeab883f74c5ef289a0bbefe2b3d8a775c2c0ba6bff37c5d14c · sha256:ef1a9d97b2dfad09… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2bc13081bd3e6eeab883f74c5ef289a0bbefe2b3d8a775c2c0ba6bff37c5d14c · sha256:ef1a9d97b2dfad09… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2bc13081bd3e6eeab883f74c5ef289a0bbefe2b3d8a775c2c0ba6bff37c5d14c · sha256:ef1a9d97b2dfad09… · /containers/cna/problemTypes/1/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/rack/rack/security/advisories/GHSA-x8cg-fq8g-mxfx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/rack/rack/security/advisories/GHSA-x8cg-fq8g-mxfx"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2bc13081bd3e6eeab883f74c5ef289a0bbefe2b3d8a775c2c0ba6bff37c5d14c · sha256:ef1a9d97b2dfad09… · /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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