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  4. CVE 2026 13773 ibm websphere extreme scale is affected by server
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Back to active CVEs
Medium · CVSS 6.0CVE-2026-13773

IBM WebSphere eXtreme Scale is affected by server side request forgery when ORB is used as Transport ProtocolCVE-2026-13773

Answer in brief

CVE-2026-13773 records a Medium severity (CVSS 6.0) vulnerability in IBM WebSphere eXtreme Scale is affected by server side request forgery when ORB is used as Transport Protocol. The current sources do not mark it as known exploited. The current feed maps IBM/WebSphere Extreme Scale (generic), IBM/WebSphere Extreme Scale (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jun 30, 2026Updated Oct 25, 2026Source checked Nov 4, 2026First seen by HOL Jun 30, 2026Material review Oct 25, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.0
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps IBM/WebSphere Extreme Scale (generic), IBM/WebSphere Extreme Scale (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:ibm:websphere_extreme_scale:*:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
IBM/WebSphere Extreme Scalegeneric8.6.1.0Not reported
IBM/WebSphere Extreme Scalegeneric>=8.6.1.0 <=8.6.1.6Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for IBM/WebSphere Extreme Scale, IBM/WebSphere Extreme Scale.
  2. 2Review the reported fix. Source-reported solution: Vulnerability is not applicable if Transport protocol is not Object Request Broker (ORB)  rather IBM eXtremeIO (XIO) .Please do not use ORB as transport protocol and use XIO as transport protocol. Please follow the below document for setting XIO as transport protocol https://www.ibm.com/docs/en/SSTVLU_8.6.1/com.ibm.websphere.extremescale.doc/txsconfigxstransport.html ORB is deprecated and we have removed ORB support from 8.6.2.* version . We recommend customers to migrate to 8.6.2.*.

Evidence timeline and material changes

  1. Published upstream

    Jun 30, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 25, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Jun 30, 2026

Sources and claim methodology

  • Source referenceibm.com
Upstream source description

IBM WebSphere Extreme Scale 8.6.1.0 through 8.6.1.6 Approximately 50 generated CORBA stub classes in WebSphere eXtreme Scale's ogclient.jar call ORB.string_to_object() on an attacker-controlled IOR string during Java deserialization, turning any unfiltered ObjectInputStream sink in WAS into outbound IIOP SSRF to an attacker-chosen host; when chained with the IBM ORB's getUserException class-instantiation flaw (WAS-26), this SSRF escalates to remote code execution on the calling JVM.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Webmin: SSRF exploit in Upload and Download and File Manager modulesAlso CWE-918
  • Readest: Unauthenticated SSRF / open request proxy in /api/opds/proxyAlso CWE-918

Record context

Vulnerability class
SSRF
EPSS
Not reported
CWE IDs
CWE-918
Source
CVE List V5
Source checked
Nov 4, 2026
References
1 linked source
Open source record