CVE-2026-75878
IBM Sterling File Gateway is Vulnerable to Authentication Bypass
IBM Sterling File Gateway could allow a remote attacker to bypass authentication and obtain a fully authenticated session due to improper authentication via an unvalidated SSO header.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
IBM Sterling File Gateway is Vulnerable to Authentication Bypass
IBM Sterling File Gateway could allow a remote attacker to bypass authentication and obtain a fully authenticated session due to improper authentication via an unvalidated SSO header.
- Record
CVE-2026-75878- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-287
- Updated
- 2026-11-02
EUVDEUVD-2026-83300
IBM Sterling File Gateway could allow a remote attacker to bypass authentication and obtain a fully authenticated session due to improper authentication via an unvalidated SSO header.
- Record
EUVD-2026-83300- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-652p-cfff-8crm
IBM Sterling File Gateway could allow a remote attacker to bypass authentication and obtain a...
IBM Sterling File Gateway could allow a remote attacker to bypass authentication and obtain a fully authenticated session due to improper authentication via an unvalidated SSO header.
- Record
GHSA-652p-cfff-8crm- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-287
- Updated
- 2026-11-02
NVD
IBM Sterling File Gateway could allow a remote attacker to bypass authentication and obtain a fully authenticated session due to improper authentication via an unvalidated SSO header.
- Record
CVE-2026-75878- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-287
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-75878 is a critical vulnerability (CVSS 9.1) in Ibm Sterling File Gateway, published September 18, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.64%, the 51st percentile. No source names a fixed version.