CVE Explorer

CVE-2026-13759

IBM WebSphere Extreme Scale 8.6.1.0 through 8.6.1.6 ships three ObjectInputStream subclasses (WsObjectInputStream, ObjectStreamPool$ReusableInputStream, ObjectInputStreamResolver) that install no JEP-290 class filter; when Coherence is on the classpath, multiple RCE gadget chains including RemoteConstructor.readResolve and PriorityQueue/ExtractorComparator are confirmed working, allowing a post-login attacker who can write a session attribute or a LAN-adjacent attacker on the grid replication wi

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:8cfcb64b3d57afa7b6b1f5b1590ac4de3dece5e0118a46144906621a7c7e6a2f

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"cpes":["cpe:2.3:a:ibm:websphere_extreme_scale:8.6.1.0:*:*:*:*:*:*:*","cpe:2.3:a:ibm:websphere_extreme_scale:8.6.1.6:*:*:*:*:*:*:*"],"product":"WebSphere Extreme Scale","vendor":"IBM","versions":[{"lessThanOrEqual":"8.6.1.6","status":"affected","version":"8.6.1.0","versionType":"semver"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:62168cf1b97a6c8e991d8e7f014e2ccdd0554364c85f105a348bc6b3700e294e · sha256:4e918a4a3fd1c553… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:62168cf1b97a6c8e991d8e7f014e2ccdd0554364c85f105a348bc6b3700e294e · sha256:4e918a4a3fd1c553… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-502","description":"CWE-502 Deserialization of Untrusted Data","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:62168cf1b97a6c8e991d8e7f014e2ccdd0554364c85f105a348bc6b3700e294e · sha256:4e918a4a3fd1c553… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion

{"tags":["vendor-advisory","patch"],"url":"https://www.ibm.com/support/pages/node/7278595"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:62168cf1b97a6c8e991d8e7f014e2ccdd0554364c85f105a348bc6b3700e294e · sha256:4e918a4a3fd1c553… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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