Cyber Resilience

CVE-2026-47889

Published
27 August 2026
Modified
28 August 2026
CVSS Score v3.1 7.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0025 17th percentile
Risk Priority 56 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2026-47889 is a high-severity Sensitive Cookie with Improper SameSite Attribute (CWE-1275) vulnerability in Spring Framework (inferred from references). Its CVSS base score is 7.5 (High).

Operationally, ranked at the 17th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to CM-6 (Configuration Settings) and SC-23 (Session Authenticity) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A01:2025 Broken Access Control

EU & UK References

Vulnerability Data

A WebFlux application running on the Jetty 12 Core reactive adapter serializes response cookies without the sameSite attribute. Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19

CWE(s)
CWE-1275

Related Threats

CVEs Like This One

CVE-2025-52628Shared CWE-1275
CVE-2024-30155Shared CWE-1275
CVE-2024-6611Shared CWE-1275
CVE-2023-53957Shared CWE-1275
CVE-2025-36134Shared CWE-1275
CVE-2026-55688Shared CWE-1275
CVE-2024-43173Shared CWE-1275
CVE-2024-42212Shared CWE-1275
CVE-2025-24387Shared CWE-1275
CVE-2026-8414Shared CWE-1275

Affected Assets

Spring
Framework
inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V3.3.2

Mitigating Controls (NIST 800-53 r5) AI

CM-6 Configuration Settings good match

Establishing secure configuration settings for web components includes requiring appropriate SameSite attributes on sensitive cookies.

SC-23 Session Authenticity good match

Proper SameSite settings on session cookies directly help protect the authenticity of communications sessions against cross-site misuse.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-01 mostly match
prevents

Secure configuration baselines and enforcement directly require proper SameSite settings on sensitive cookies.

PR.PS-06 mostly match
prevents

Secure SDLC practices include coding standards and reviews that mandate correct SameSite attributes.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect missing SameSite attributes but does not prevent the weakness.

A.8.26 Application security requirements partial match
prevents

Application security requirements can mandate SameSite attributes on sensitive cookies.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly require proper SameSite settings to prevent CSRF.

References