CVE-2026-18531

IBM MAS uses axios-1.15.2, protobufjs-8.0.1 and undici-7.26 which is vulnerable to multiple CVEs, and contains vulnerabilities related to missing Secure attribute on mas-redirect-uri cookie and weak HMAC Session Secret

MEDIUM
5.3
CVSS Score
Published: August 5, 2026 at 04:04 PM UTC
Updated: October 23, 2026 at 09:10 PM UTC
1 product affected across 1 vendorMaximo Application Suite

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

IBM Maximo Application Suite 9.2, 9.1, and 9.0 could allow a remote attacker to tamper with session data due to the use of a weak HMAC session signing secret.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

9.0 ≤ v < 9.0.289.1 ≤ v < 9.1.209.09.0.09.19.1.09.29.2.0
Affected range stops below 9.0.28, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.1.20, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

Vendor AdvisoryPatch
Source: cverecord
https://www.ibm.com/support/pages/node/7282362

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMibm
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-330

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