Cyber Resilience

CVE-2026-1561

SSRF in Ibm Websphere Application Server 17.0.0.3 – 26.0.0.4

SSRF
Published
25 March 2026
Modified
30 March 2026
Patch / advisory
View advisory
CVSS Score v3.1 5.4
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
EPSS Score 0.0028 21th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2026-1561 is a medium-severity SSRF (CWE-918) vulnerability in Ibm Websphere Application Server. Its CVSS base score is 5.4 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 21th 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 AC-4 (Information Flow Enforcement) and SI-10 (Information Input Validation) — 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

IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.3 IBM WebSphere Application Server Liberty is vulnerable to server-side request forgery (SSRF). This may allow remote attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating…

more

other attacks.

CWE(s)
CWE-918

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1046 Network Service Discovery Discovery
Adversaries may attempt to get a listing of services running on remote hosts and local network infrastructure devices, including those that may be vulnerable to remote software exploitation.
attack.mitre.org →
T1018 Remote System Discovery Discovery
Adversaries may attempt to get a listing of other systems by IP address, hostname, or other logical identifier on a network that may be used for Lateral Movement from the current system.
attack.mitre.org →
Why these techniques?

SSRF in public-facing app directly enables T1190 exploitation; resulting unauthorized requests facilitate internal network enumeration (T1046/T1018).

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-9006Same product: Ibm Aix
CVE-2026-1015Same product: Ibm Aix
CVE-2025-27907Same product: Ibm Aix
CVE-2026-7754Same product: Apple Macos
CVE-2025-14912Same product: Ibm Aix
CVE-2023-35896Same product: Linux Linux Kernel
CVE-2026-48290Same product: Apple Macos
CVE-2023-29260Same product: Ibm Aix
CVE-2024-1884Same product: Apple Macos
CVE-2025-52453Same product: Linux Linux Kernel

Affected Assets

ibm
websphere application server
17.0.0.3 — 26.0.0.4

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)
  • AC-4 Information Flow Enforcement
  • SI-10 Information Input Validation
  • SC-7 Boundary Protection
Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.3.6
  • V1.5.3
  • V5.3.2
  • V10.4.7

Mitigating Controls (NIST 800-53 r5) AI

AC-4 Information Flow Enforcement good match
prevent

Directly enforces information flow policies to block the server from issuing unauthorized outbound requests to internal or external resources.

SI-10 Information Input Validation good match
prevent

Requires validation of URL and request-target inputs so that attacker-supplied values cannot be used to initiate SSRF connections.

SC-7 Boundary Protection partial match
prevent

Boundary-protection rules can restrict the application's outbound network connections, limiting the destinations reachable via SSRF.

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-06 mostly match
prevents

Secure development practices directly include input validation and destination allow-listing that prevent SSRF.

DE.CM-09 partial match
prevents

Runtime monitoring of web applications and services can detect anomalous outbound requests indicative of SSRF.

ID.RA-01 partial match
prevents

Vulnerability identification processes can discover and record SSRF flaws in web applications.

PR.IR-01 partial match
prevents

Network segmentation and egress controls can limit the damage from successful SSRF requests.

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.5.7 Threat intelligence partial match
prevents

Operational threat data describing SSRF campaigns can be used to tighten outbound-request allow-lists and detection rules before attackers exploit them.

References