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CVE-2026-44433

Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit 8b178e6, an adversarial peer could send a STREAM frame carrying just one byte at the largest offset being permitted to obtain additional flow control credit, which under certain circumstances could lead to a Denial of Service. Assuming the application prepares a receive buffer for storing all data that arrive out-of-order, up to the largest offset being received, this behavior co
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:86e4bfae6c7547f06fa56af6333eaef69eb2166ee2ef4edd6bec3fa5baf31e5e
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-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:3852bc7d05e0833537a50f125f13f366e898fa714914ad963ad695ca9a3008df · sha256:c3eb261faf4a04c2… · /containers/cna/problemTypes/0/descriptions/0

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

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:3852bc7d05e0833537a50f125f13f366e898fa714914ad963ad695ca9a3008df · sha256:c3eb261faf4a04c2… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"quicly","vendor":"h2o","versions":[{"status":"affected","version":"< 8b178e6"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:3852bc7d05e0833537a50f125f13f366e898fa714914ad963ad695ca9a3008df · sha256:c3eb261faf4a04c2… · /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:v2:3852bc7d05e0833537a50f125f13f366e898fa714914ad963ad695ca9a3008df · sha256:c3eb261faf4a04c2… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"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:v2:3852bc7d05e0833537a50f125f13f366e898fa714914ad963ad695ca9a3008df · sha256:c3eb261faf4a04c2… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:3852bc7d05e0833537a50f125f13f366e898fa714914ad963ad695ca9a3008df · sha256:c3eb261faf4a04c2… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/h2o/quicly/commit/8b178e692c51a3b1031612ef89f03a53aac63c15","tags":["x_refsource_MISC"],"url":"https://github.com/h2o/quicly/commit/8b178e692c51a3b1031612ef89f03a53aac63c15"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3852bc7d05e0833537a50f125f13f366e898fa714914ad963ad695ca9a3008df · sha256:c3eb261faf4a04c2… · /containers/cna/references/1
{"name":"https://github.com/h2o/quicly/security/advisories/GHSA-f7qr-4p37-9gx9","tags":["x_refsource_CONFIRM"],"url":"https://github.com/h2o/quicly/security/advisories/GHSA-f7qr-4p37-9gx9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3852bc7d05e0833537a50f125f13f366e898fa714914ad963ad695ca9a3008df · sha256:c3eb261faf4a04c2… · /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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