TI-2026-77877 Aliases CVE-2026-101570 GHSA-c2wh-pwcp-762h

Resource exhaustion in Oracle Helidon HTTP/2 web server

LOW 17CWE-400Published 2026-10-20 · Updated 2026-10-29

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · Low
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-400.

Summary

Oracle Helidon versions 4.0.0 through 4.5.5 are affected, in the helidon-webserver-http2 component. Uncontrolled resource consumption (CWE-400) lets an unauthenticated remote attacker over HTTP/2 cause a partial denial of service. The attack is difficult to carry out.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webserver-http2). Supported versions that are affected are 4.0.0-4.5.5. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP/2 to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 3.7 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00307 23rd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Oracle	Helidon	4.0.0 – 4.5.5	—	No fix listed	CNA

Helidon VendorOracle Affected 4.0.0 – 4.5.5 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:oracle:helidon::::::::	—	—	Oracle

cpe:2.3:a:oracle:helidon:*:*:*:*:*:*:*:* Versions — — ·Oracle

Remediation

The sources list no fixed version for Oracle Helidon.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Advisory · 2026-10-20
Oracle Helidon — oracle.com/security-alerts/cpuoct2026.html
22 records Highest priority Priority MEDIUM 1 MEDIUM, 21 LOW
Other records, highest priority first
- TI-2026-77897 Missing authentication in Oracle Helidon lets attackers modify dataPriority MEDIUM 48
- TI-2026-77879 Uncontrolled resource consumption in Oracle Helidon HTTP/2 clientPriority LOW 39
- TI-2026-77892 Information exposure in Oracle Helidon CORS componentPriority LOW 37
Show all 22 records → Advisory →

Timeline

2026-10-21 Threatist record created from CVE-2026-101570
2026-10-21 Alias added: GHSA-c2wh-pwcp-762h
2026-10-29 Weakness changed · CISA ADP
2026-10-29 CISA SSVC decision points changed

References

Advisory 1

Oracle Advisory

TI-2026-34425 Improper privilege management in Oracle Payments KEVCVSS 3.1CRITICAL 9.8
TI-2026-27421 Missing authentication in Oracle PeopleSoft Enterprise PeopleTools KEVCVSS 3.1CRITICAL 9.8
TI-2026-17661 Improper access control in Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in KEVCVSS 3.1CRITICAL 10.0
TI-2025-38252 Improper authentication in Oracle Concurrent Processing KEVCVSS 3.1CRITICAL 9.8
TI-2025-38151 Missing authentication in Oracle Identity Manager KEVCVSS 3.1CRITICAL 9.8
TI-2022-07142 Code injection in Spring Framework KEVCVSS 3.1CRITICAL 9.8

See all 14200 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences