CVE-2026-15556

HIGH
MEDIUM Priority: 0.03 BB Relevance: 66/100
Published: 2026-08-11 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: Unchanged
C: High
I: High
A: None

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.

Weakness Classification (1)

Bug Bounty Relevance

66 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

8.1 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS — Exploitation Probability

0.33%
Raw Score 0.003290
Percentile 26.0%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00329
2026-10-28
0.00329

Intelligence Sources

mitre ref →
nvd ref →