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CVE-2026-11586

By default, curl automatically responds to WebSocket PING frames. Because curl lacks an upper bound on memory allocation for unacknowledged frames, a malicious server can exhaust all available memory by flooding curl with rapid, sequential PING messages.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c830be0d7ec3487c1487c8d245400e4dba06fdb7cdc90e1e4f2fc081a9a5c871
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"curl","vendor":"curl","versions":[{"lessThanOrEqual":"8.20.0","status":"affected","version":"8.20.0","versionType":"semver"},{"lessThanOrEqual":"8.19.0","status":"affected","version":"8.19.0","versionType":"semver"},{"lessThanOrEqual":"8.18.0","status":"affected","version":"8.18.0","versionType":"semver"},{"lessThanOrEqual":"8.17.0","status":"affected","version":"8.17.0","versionType":"semver"},{"lessThanOrEqual":"8.16.0","status":"affected","version":"8.16.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0593310de1831716ba24fb1c5cc159267eb7a650e6523301a3b6c010da556d68 · sha256:927d31e7bc34b4c6… · /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:v2:0593310de1831716ba24fb1c5cc159267eb7a650e6523301a3b6c010da556d68 · sha256:927d31e7bc34b4c6… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"description":"CWE-770 Allocation of Resources Without Limits or Throttling","lang":"en"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0593310de1831716ba24fb1c5cc159267eb7a650e6523301a3b6c010da556d68 · sha256:927d31e7bc34b4c6… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"www","url":"https://curl.se/docs/CVE-2026-11586.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0593310de1831716ba24fb1c5cc159267eb7a650e6523301a3b6c010da556d68 · sha256:927d31e7bc34b4c6… · /containers/cna/references/1
{"name":"json","url":"https://curl.se/docs/CVE-2026-11586.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0593310de1831716ba24fb1c5cc159267eb7a650e6523301a3b6c010da556d68 · sha256:927d31e7bc34b4c6… · /containers/cna/references/0
{"name":"issue","url":"https://hackerone.com/reports/3788931"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0593310de1831716ba24fb1c5cc159267eb7a650e6523301a3b6c010da556d68 · sha256:927d31e7bc34b4c6… · /containers/cna/references/2

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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