CVE-2026-103471

restbed through 5.0.0 buffers HTTP request headers without enforcing a maximum size limit, allowing remote unauthenticated attackers to exhaust server memory. Attackers can open TCP connections and stream bytes indefinitely without sending the header delimiter, forcing the server to allocate unbounded heap memory until the process is killed.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/Corvusoft/restbed
https://github.com/Corvusoft/restbed/blob/e1227a297ce6d4e9f78222456507b29bb8ab77e9/src/corvusoft/restbed/detail/service_impl.cpp#L554
https://github.com/Corvusoft/restbed/blob/e1227a297ce6d4e9f78222456507b29bb8ab77e9/src/corvusoft/restbed/session.cpp#L200
https://github.com/Corvusoft/restbed/issues/558
https://www.vulncheck.com/advisories/restbed-through-5.0.0-denial-of-service-via-unbounded-header-buffering
https://github.com/Corvusoft/restbed/issues/558

Configurations

No configuration.

History

30 Sep 2026, 20:17

Type	Values Removed	Values Added
References	~~() https://github.com/Corvusoft/restbed/issues/558 -~~	() https://github.com/Corvusoft/restbed/issues/558 -

30 Sep 2026, 18:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-30 18:18

Updated : 2026-09-30 20:17

NVD link : CVE-2026-103471

Mitre link : CVE-2026-103471

CVE.ORG link : CVE-2026-103471

JSON object : View

Products Affected

No product.

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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