TI-2026-77483 Aliases CVE-2026-91428 GHSA-8p5g-vp3h-xv7r

URL redirection in Oracle Siebel CRM End User Open UI

LOW 19CWE-601Published 2026-10-20 · Updated 2026-10-23

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Spoofing
Confidentiality · integrity · availability: None · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-601.

Summary

Oracle Siebel CRM End User versions from 17.0 through 26.9 are affected by a flaw in the Open UI component. The flaw is a URL redirection to an untrusted site (CWE-601). An unauthenticated remote attacker over HTTP can gain unauthorized update, insert or delete access to some Siebel CRM End User data, but only when a person other than the attacker interacts with the attack.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

Vulnerability in the Siebel CRM End User product of Oracle Siebel CRM (component: Open UI). Supported versions that are affected are 17.0-26.9. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM End User. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Siebel CRM End User accessible data. CVSS 3.1 Base Score 4.3 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0021 11th 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	Siebel CRM End User	17.0 – 26.9	—	No fix listed	CNA

Siebel CRM End User VendorOracle Affected 17.0 – 26.9 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:oracle:siebel_crm::::::::	17.0 – 26.9	Vulnerable	Oracle

cpe:2.3:a:oracle:siebel_crm:*:*:*:*:*:*:*:* Versions 17.0 – 26.9 Vulnerable ·Oracle

Remediation

The sources list no fixed version for Siebel CRM End User.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Fixed in the same release

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

Advisory · 2026-10-20
Oracle Siebel CRM End User — oracle.com/security-alerts/cpuoct2026.html
14 records Highest priority Priority MEDIUM 1 MEDIUM, 13 LOW
Other records, highest priority first
- TI-2026-77500 Missing authentication in Oracle Siebel CRM End User exposes dataPriority MEDIUM 41
- TI-2026-77778 Access control flaw in Oracle Siebel CRM End User exposes dataPriority LOW 39
- TI-2026-77487 Improper access control in Oracle Siebel CRM End User exposes dataPriority LOW 35
Show all 14 records → Advisory →

Timeline

2026-10-21 Threatist record created from CVE-2026-91428
2026-10-21 Alias added: GHSA-8p5g-vp3h-xv7r
2026-10-24 Weakness changed · CISA ADP
2026-10-24 CISA SSVC decision points changed

References

Advisory 1

Oracle Advisory

TI-2026-44706 Improper access control in Oracle Siebel CRM Integration CVSS 3.1CRITICAL 9.8
TI-2026-44699 Improper access control in Oracle Siebel CRM Administration CVSS 3.1CRITICAL 9.8
TI-2026-44566 Improper access control in Oracle Siebel CRM Cloud Applications CVSS 3.1CRITICAL 9.9
TI-2026-43962 Improper access control in Oracle Siebel CRM Cloud Applications CVSS 3.1CRITICAL 9.8
TI-2026-34639 Missing authentication in Oracle Siebel CRM Development CVSS 3.1CRITICAL 9.8
TI-2026-34525 Improper access control in Oracle Siebel CRM Cloud Applications CVSS 3.1CRITICAL 9.8

See all 244 →

Sources

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