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SAP UI5 CVE-2026-76977

| EUVDEUVD-2026-72588 MEDIUM
Improper Validation of Unsafe Equivalence in Input (CWE-1289)
2026-09-08 sap GHSA-6p8v-3qw2-gh8w
4.3
CVSS 3.1 · Vendor: sap
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Severity by source

Vendor (sap) PRIMARY
4.3 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
vuln.today AI
4.3 MEDIUM

Vendor-provided vector is accurate: no attacker privileges needed, active victim interaction required, low integrity-only impact, no scope change.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (sap).

CVSS VectorVendor: sap

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

Lifecycle Timeline

3
Metadata Corrected
Sep 08, 2026 - 01:40 vuln.today
tag: Authentication Bypass removed
Analysis Generated
Sep 08, 2026 - 01:09 vuln.today
CVE Published
Sep 08, 2026 - 00:13 cve.org
MEDIUM 4.3

DescriptionCVE.org

SAP UI5 does not sufficiently validate the parent frame's origin against the configured allowlist. An unauthenticated attacker could host a malicious page to bypass framing restrictions. If an authenticated victim visits the attacker's page and interacts with it, the attacker could trick the victim into performing unintended actions, resulting in a low impact on integrity. There is no impact on confidentiality and availability.

AnalysisAI

SAPUI5's frame options allowlist feature insufficiently validates parent frame origins, enabling a framing-based social engineering attack against authenticated SAP users. An unauthenticated attacker can host a malicious page that embeds a SAPUI5 application in an iframe while bypassing the configured origin allowlist, then lure an authenticated victim into interacting with it to trigger unintended in-application actions. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires three conditions to align: first, the target SAPUI5 application must have the frame options allowlist feature configured (the vulnerability is in this specific feature's origin validation logic); second, the victim must hold an active authenticated session with the SAPUI5 application at the time of visiting the attacker's page; third, the victim must actively interact with UI elements on the attacker's page (UI:R - passive visit alone is insufficient). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.3 (Medium) rating with vector AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N accurately reflects the constrained real-world impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Apply the patch released by SAP as documented in SAP Note 3783189 (me.sap.com/notes/3783189), available via the SAP Security Patch Day portal at url.sap/sapsecuritypatchday. … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-76977 vulnerability details – vuln.today

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