CVE-2026-15556
Advisory lineage Upstream: 0 Downstream: 3
Awaiting Analysis
Published: 11 Aug 2026, 08:49
Last modified:17 Sept 2026, 23:27
Vulnerability Summary
Overall Risk (default)
medium
32/100 CVSS Score
8.1 HIGH
v3.1 (cve.org)
EPSS Score
0.24% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected
Timeline
11 Aug 2026, 08:49
Published
Vulnerability first disclosed
17 Sept 2026, 23:27
Last Modified
Vulnerability information updated
Description
A flaw was found in Picketlink's SP signature validation; a SAML response containing zero assertion elements matching the signature check can allow an attacker to forge a SAML response and auth as any principal with any roles on the protected application.
CVSS Metrics
- v3.1•HIGH•Score: 8.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS Trends
Current EPSS score: 0.24%• Percentile: 15%
Techniques & Countermeasures
- CWE-347•Improper Verification of Cryptographic Signature
The product does not verify, or incorrectly verifies, the cryptographic signature for data.