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CVE-2026-85511· NVD / CVE Program· CNA redhat

Wildfly-elytron-realm-token: parameter injection in eap's elytron oauth2

A flaw was found in EAP's Elytron. An EAP application whose security domain is backed by an Elytron token-realm with oauth2-introspection would allow parameter substitution due to missing URL encoding.

MediumCVSS 4.2 · v3.1—No exploit No fix recorded

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Published
Sep 18, 2026
Updated
Sep 25, 2026
EPSS
0.3% · 18th percentile
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Report tools

JSON

Action score

16

Monitor

Low priority for now.

CVSS
16 / 40 · 4.2 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
4.2
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Red Hat Data Grid 8

    • all versionsaffected

  • Red Hat Red Hat Fuse 7

    • all versionsaffected

  • Red Hat Red Hat JBoss Enterprise Application Platform 7

    • all versionsunknown

  • Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10

    • 0:2.40.0-8.redhat_00024.1.el10eap and laternot affected · rpm
    • 0:4.1.7-1.SP1_redhat_00001.1.el10eap and laternot affected · rpm
    • 0:2.0.5-1.Final_redhat_00001.1.el10eap and laternot affected · rpm
    • 0:1.85.0-1.redhat_00001.1.el10eap and laternot affected · rpm
    • 0:1.2.7-1.redhat_00002.1.el10eap and laternot affected · rpm
    • 0:801.8.0-1.GA_redhat_00001.1.el10eap and laternot affected · rpm
    • 0:6.6.54-1.Final_redhat_00001.1.el10eap and laternot affected · rpm
    • 0:4.1.5-5.redhat_00008.1.el10eap and laternot affected · rpm
    • 0:3.0.22-1.Final_redhat_00001.1.el10eap and laternot affected · rpm
    • 0:2.18.9-1.redhat_00003.1.el10eap and laternot affected · rpm

  • Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8

    • 0:2.40.0-8.redhat_00024.1.el8eap and laternot affected · rpm
    • 0:4.1.7-1.SP1_redhat_00001.1.el8eap and laternot affected · rpm
    • 0:2.0.5-1.Final_redhat_00001.1.el8eap and laternot affected · rpm
    • 0:1.85.0-1.redhat_00001.1.el8eap and laternot affected · rpm
    • 0:1.2.7-1.redhat_00002.1.el8eap and laternot affected · rpm
    • 0:801.8.0-1.GA_redhat_00001.1.el8eap and laternot affected · rpm
    • 0:6.6.54-1.Final_redhat_00001.1.el8eap and laternot affected · rpm
    • 0:4.1.5-5.redhat_00008.1.el8eap and laternot affected · rpm
    • 0:3.0.22-1.Final_redhat_00001.1.el8eap and laternot affected · rpm
    • 0:2.18.9-1.redhat_00003.1.el8eap and laternot affected · rpm

  • Red Hat Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9

    • 0:2.40.0-8.redhat_00024.1.el9eap and laternot affected · rpm
    • 0:4.1.7-1.SP1_redhat_00001.1.el9eap and laternot affected · rpm
    • 0:2.0.5-1.Final_redhat_00001.1.el9eap and laternot affected · rpm
    • 0:1.85.0-1.redhat_00001.1.el9eap and laternot affected · rpm
    • 0:1.2.7-1.redhat_00002.1.el9eap and laternot affected · rpm
    • 0:801.8.0-1.GA_redhat_00001.1.el9eap and laternot affected · rpm
    • 0:6.6.54-1.Final_redhat_00001.1.el9eap and laternot affected · rpm
    • 0:4.1.5-5.redhat_00008.1.el9eap and laternot affected · rpm
    • 0:3.0.22-1.Final_redhat_00001.1.el9eap and laternot affected · rpm
    • 0:2.18.9-1.redhat_00003.1.el9eap and laternot affected · rpm

  • Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack

    • all versionsunknown

  • Red Hat Red Hat Single Sign-On 7

    • all versionsaffected

Same product

red hat: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-5680Undertow-core: undertow: denial of service via websocket permessage-deflate processing
    30Monitor
  • CVE-2026-10832Org.wildfly.security/wildfly-elytron-asn1: unbounded memory allocation in wildfly elytron asn.1 derdecoder via crafted der payload
    23Monitor
  • CVE-2026-14180Undertow-core: undertow:http request smuggling via oversized chunk-size bit overlap
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-290 · Authentication Bypass by Spoofing

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records