CVE-2026-103471 restbed - Denial of Service

restbed <= 5.0.0 contains a denial of service caused by unbounded buffering of HTTP request headers without size limit, letting remote unauthenticated attackers exhaust server memory by streaming bytes indefinitely, exploit requires open TCP connection.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.55% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
30 September 2026
Updated
15 October 2026
Weakness
CWE-770

Vendor fix

Update to the latest version that enforces maximum HTTP header size limits.

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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