CVE-2026-6276

ADVISORY - nist

Summary

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.

EPSS Score: 0.00019 (0.054)

Common Weakness Enumeration (CWE)

ADVISORY - nist

Cleartext Transmission of Sensitive Information

ADVISORY - redhat

Origin Validation Error


NIST

CREATED

UPDATED

ADVISORY IDCVE-2026-6276
EXPLOITABILITY SCORE

3.9

EXPLOITS FOUND
COMMON WEAKNESS ENUMERATION (CWE)

CVSS SCORE

7.5high

Alpine

CREATED

UPDATED

ADVISORY IDCVE-2026-6276
EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-
RATING UNAVAILABLE FROM ADVISORY

Debian

CREATED

UPDATED

ADVISORY IDCVE-2026-6276
EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-
RATING UNAVAILABLE FROM ADVISORY

Ubuntu

CREATED

UPDATED

ADVISORY IDCVE-2026-6276
EXPLOITABILITY SCORE

3.9

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

7.5low

Red Hat

CREATED

UPDATED

ADVISORY IDCVE-2026-6276
EXPLOITABILITY SCORE

2.2

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)

CVSS SCORE

3.7low

Photon

CREATED

UPDATED

ADVISORY ID

CVE-2026-6276

EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-

CVSS SCORE

7.5high

minimos

CREATED

UPDATED

ADVISORY ID

MINI-2256-qmv4-xpgc

EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-
RATING UNAVAILABLE FROM ADVISORY

minimos

CREATED

UPDATED

ADVISORY ID

MINI-9q6r-wh3r-gg9m

EXPLOITABILITY SCORE

-

EXPLOITS FOUND
-
COMMON WEAKNESS ENUMERATION (CWE)-
RATING UNAVAILABLE FROM ADVISORY