CVE Explorer
CVE-2026-9545
In this scenario, libcurl first uses a proper HTTP/3 server for the initial
transfers, and when it makes a second transfer to the same site it has been
replaced by the attacker's impostor machine - without a valid certificate.
When libcurl returns to the hostname the second time with a cached SSL session
(`CURLOPT_SSL_SESSIONID_CACHE` is not disabled) and early data enabled (the
`CURLSSLOPT_EARLYDATA` bit is set in `CURLOPT_SSL_OPTIONS`), libcurl might
send off the second request's bytes on tha
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"},{"lessThanOrEqual":"8.15.0","status":"affected","version":"8.15.0","ve…
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:3f06723d7a477f3d2e60d7f9cae1534445f8d02694a80e02413da869b3d88915 · sha256:b33db9c3ac917b8d… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:3f06723d7a477f3d2e60d7f9cae1534445f8d02694a80e02413da869b3d88915 · sha256:b33db9c3ac917b8d… · /containers/adp/0/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"description":"CWE-200 Exposure of Sensitive Information to an Unauthorized Actor","lang":"en"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:3f06723d7a477f3d2e60d7f9cae1534445f8d02694a80e02413da869b3d88915 · sha256:b33db9c3ac917b8d… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"name":"www","url":"https://curl.se/docs/CVE-2026-9545.html"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3f06723d7a477f3d2e60d7f9cae1534445f8d02694a80e02413da869b3d88915 · sha256:b33db9c3ac917b8d… · /containers/cna/references/1
{"name":"json","url":"https://curl.se/docs/CVE-2026-9545.json"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3f06723d7a477f3d2e60d7f9cae1534445f8d02694a80e02413da869b3d88915 · sha256:b33db9c3ac917b8d… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://hackerone.com/reports/3752888"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3f06723d7a477f3d2e60d7f9cae1534445f8d02694a80e02413da869b3d88915 · sha256:b33db9c3ac917b8d… · /containers/adp/0/references/0
{"name":"issue","url":"https://hackerone.com/reports/3752888"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3f06723d7a477f3d2e60d7f9cae1534445f8d02694a80e02413da869b3d88915 · sha256:b33db9c3ac917b8d… · /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.