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NVD / CVE Program· CNA redhat

CVE-2026-18963: Keycloak-services: keycloak-services: unauthenticated account takeover via reset-credentials flow bypass

Noroxi assessment

Priority: Monitor (action score 38/100)

  • A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
  • Public proof-of-concept code exists (Exploit-DB, GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 6.5% (FIRST EPSS); higher than 93.8% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: org.keycloak:keycloak-services (Maven) 26.4.15, 26.6.6, 26.7.2.

Low priority for now. Upgrade to org.keycloak:keycloak-services (Maven) 26.4.15, 26.6.6, 26.7.2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A flaw was found in the reset-credentials flow of the keycloak-services component, which is the core engine for identity and access management in Red Hat Build of Keycloak. The issue allows an unauthenticated attacker to force the password reset process for any user without needing to click the required email verification link. This can result in the attacker gaining full control over target user accounts by directly setting new credentials.

CriticalCVSS 9.1 · v3.1—Proof of concept Fix available
Published
Aug 18, 2026
Updated
Oct 23, 2026
EPSS
6.5% · 93th percentile

Report tools

JSON

Action score

38

Monitor

Low priority for now.

CVSS
36 / 40 · 9.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
2 / 30 · 6.5%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
9.1
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.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-18963

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

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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 build of Keycloak 26.4

    • 26.4.15-1 and laternot affected · rpm
    • 26.4-23 and laternot affected · rpm
    • 26.4-23 and laternot affected · rpm

  • Red Hat Red Hat build of Keycloak 26.4.15

    • all versionsunknown
    • all versionsunknown

  • Red Hat Red Hat build of Keycloak 26.6

    • 26.6.6-1 and laternot affected · rpm
    • 26.6-12 and laternot affected · rpm
    • 26.6-12 and laternot affected · rpm

  • Red Hat Red Hat build of Keycloak 26.6.6

    • all versionsunknown
    • all versionsunknown
    • all versionsunknown

  • Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack

    • all versionsunknown

  • Red Hat Red Hat Single Sign-On 7

    • all versionsaffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Mavenorg.keycloak:keycloak-servicesfrom 26.0.0 · before 26.4.1526.4.15
Mavenorg.keycloak:keycloak-servicesfrom 26.5.0 · before 26.6.626.6.6
Mavenorg.keycloak:keycloak-servicesfrom 26.7.0 · before 26.7.226.7.2

Same product

red hat: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-1486Org.keycloak.protocol.oidc.grants: disabled identity providers are still accepted for jwt authorization grant
    35Monitor
  • CVE-2026-74909Keycloak-services: keycloak-services: incomplete fix for cve-2026-15573 allows policy enforcer bypass via percent-encoded uri segments
    32Monitor
  • CVE-2026-79651Keycloak-services: keycloak-services: unauthenticated dos via unbounded locale caching
    30Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-2733Feb 19, 2026 · Org.keycloak/keycloak-services: keycloak: missing check on disabled client for docker registry protocol
    15Monitor
  • ← EarlierCVE-2026-9088Jun 5, 2026 · Keycloak: keycloak: information disclosure due to user profile permission bypass
    10Monitor
  • Later →CVE-2026-19729Sep 9, 2026 · Keycloak-services: keycloak-services: incomplete fix for arbitrary filesystem path probing via keystore parameters
    19Monitor

Remediation

Which version to upgrade to

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

Product / packageFixed versionSource
Maven:org.keycloak:keycloak-services26.4.15Package registry (OSV)
Maven:org.keycloak:keycloak-services26.6.6Package registry (OSV)
Maven:org.keycloak:keycloak-services26.7.2Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Exploit-DB entry ×1
  • Nuclei detection template ×1
  • Proof-of-concept repository on GitHub ×17

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entrywebapps2026-10-21
Nuclei detection templateNuclei template CVE-2026-18963 —
Proof-of-concept repository on GitHubstars:152026-08-20
Proof-of-concept repository on GitHubstars:452026-08-20
Proof-of-concept repository on GitHubstars:02026-08-24
Proof-of-concept repository on GitHubstars:42026-08-24
Proof-of-concept repository on GitHubstars:202026-08-24
Proof-of-concept repository on GitHubstars:172026-08-25
Proof-of-concept repository on GitHubstars:02026-08-25
Proof-of-concept repository on GitHubstars:12026-08-25
Proof-of-concept repository on GitHubstars:12026-08-25
Proof-of-concept repository on GitHubstars:42026-08-27

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.

  1. Published
  2. First PoC+1 d
  3. TodayNov 11, 2026+84 d
EPSS, last 120 days+2% in 7 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.

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.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

CWE-640 · Weak Password Recovery Mechanism for Forgotten Password

CVSS vector

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

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

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

All records