CVE Explorer
CVE-2026-6276
Using libcurl, when a custom `Host:` header is first set for an HTTP request
and a second request is subsequently done using the same *easy handle* but
without the custom `Host:` header set, the second request would use stale
information and pass on cookies meant for the first host in the second
request. Leak them.
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":"8.19.0","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","versionType":"semver"},{"lessThanOrEqual":"8.14.1","status":"affected","version":"8.14.1","ve…
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:e7cf741daf5ab0927dd002298f12a0d25816c5b431e262d93f237936562a3b78 · sha256:e92f6ee0eeaf3b61… · /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_v5cvssurn:baitaphish:normalized-source-record:v2:e7cf741daf5ab0927dd002298f12a0d25816c5b431e262d93f237936562a3b78 · sha256:e92f6ee0eeaf3b61… · /containers/adp/1/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"description":"CWE-346 Origin Validation Error","lang":"en"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:e7cf741daf5ab0927dd002298f12a0d25816c5b431e262d93f237936562a3b78 · sha256:e92f6ee0eeaf3b61… · /containers/cna/problemTypes/0/descriptions/0
Source references
5 source assertions{"url":"http://www.openwall.com/lists/oss-security/2026/04/29/13"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:e7cf741daf5ab0927dd002298f12a0d25816c5b431e262d93f237936562a3b78 · sha256:e92f6ee0eeaf3b61… · /containers/adp/0/references/0
{"name":"www","url":"https://curl.se/docs/CVE-2026-6276.html"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:e7cf741daf5ab0927dd002298f12a0d25816c5b431e262d93f237936562a3b78 · sha256:e92f6ee0eeaf3b61… · /containers/cna/references/1
{"name":"json","url":"https://curl.se/docs/CVE-2026-6276.json"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:e7cf741daf5ab0927dd002298f12a0d25816c5b431e262d93f237936562a3b78 · sha256:e92f6ee0eeaf3b61… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://hackerone.com/reports/3671818"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:e7cf741daf5ab0927dd002298f12a0d25816c5b431e262d93f237936562a3b78 · sha256:e92f6ee0eeaf3b61… · /containers/adp/1/references/0
{"name":"issue","url":"https://hackerone.com/reports/3671818"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:e7cf741daf5ab0927dd002298f12a0d25816c5b431e262d93f237936562a3b78 · sha256:e92f6ee0eeaf3b61… · /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.