VIR Vulnerability Intelligence Relay

CVE-2026-6276

high
Published 2026-05-13 · Modified 2026-05-14
💬 Discuss on Community ✚ Propose mitigation
CVSS v3
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4 NEW
—
not yet in upstream
VIR risk
7.5

Description

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.

Predictions

Exploit likelihood
83%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact
OSVersionStatusFixed in
debian debianbookwormaffected
debian debianbullseyeaffected
debian debianforkyfixed8.20.0~rc3-1
debian debiansidfixed8.20.0~rc3-1
debian debiantrixieaffected
suse slesaffected
windows windowsaffected

Application impact
VendorProductVersionsFixed
haxxcurl{"startIncluding":"7.71.0","endExcluding":"8.20.0"}8.20.0
gcp googlegcp

References

CWEs

CWE-319

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.