CVE-2026-103030 Dio - Broken Access Control

Dio 1.0.0 to 2.8.0 contains a broken access control caused by Http2Adapter._fetch copying original headers on cross-origin redirects without origin checks, letting attackers receive sensitive headers on redirected requests, exploit requires use of Http2Adapter with redirects enabled.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.36% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Information Disclosure, Broken Access Control
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
13 October 2026
Updated
15 October 2026
Weakness
CWE-200

Vendor fix

Update to version 2.8.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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