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Full vulnerability report · 2026
CVE-2026-6918High confidence

In Eclipse Open9J versions 0.21 to 0.58, a pre-authentication remote attacker can crash JITServer by sending a 32-byte crafted TCP message

Eclipse Foundation · Eclipse OpenJ9

8.7HighCVSS 4.0
Recommended action
Within 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-27315

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

In Eclipse Open9J versions 0.21 to 0.58, a pre-authentication remote attacker can crash JITServer by sending a 32-byte crafted TCP message.

What

In Eclipse Open9J versions 0.21 to 0.58, a pre-authentication remote attacker can crash JITServer by sending a 32-byte crafted TCP message.

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

What

In Eclipse Open9J versions 0.21 to 0.58, a pre-authentication remote attacker can crash JITServer by sending a 32-byte crafted TCP message.

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
a network path → Out-of-bounds Read → disrupt the affected service
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Not a CVSS 4.0 base metric
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-125 ↗

CWE-125: Out-of-bounds Read. The product reads data past the end, or before the beginning, of the intended buffer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Common Vulnerability Scoring System 4.0: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.ATNoneAttack requirements: No additional deployment or execution condition is required.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.VCNoneVulnerable-system confidentiality: No direct loss is represented by this metric.VINoneVulnerable-system integrity: No direct loss is represented by this metric.VAHighVulnerable-system availability: A successful attack can cause a major loss.SCNoneSubsequent-system confidentiality: No direct loss is represented by this metric.SINoneSubsequent-system integrity: No direct loss is represented by this metric.SANoneSubsequent-system availability: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedDenial of serviceCWE-125Public exploit reference
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-W-2026-1687IBM License Metric Tool: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in IBM License Metric Tool ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.

Official advisory
CERT-FR · French · CERTFR-2026-AVI-1121Multiples vulnérabilités dans les produits IBM

ord?id=CVE-2026-47027 Référence CVE CVE-2026-47057 https://www.cve.org/CVERecord?id=CVE-2026-47057 Référence CVE CVE-2026-47058 https://www.cve.org/CVERecord?id=CVE-2026-47058 Référence CVE CVE-2026-47059 https://www.cve.org/CVERecord?id=CVE-2026-47059 Référence CVE CVE-2026-47063 https://www.cve.org/CVERecord?id=CVE-2026-47063 Référence CVE CVE-2026-49844 https://www.cve.org/CVERecord?id=CVE-2026-49844 Référence CVE CVE-2026-55223 https://www.cve.org/CVERecord?id=CVE-2026-55223 Référence CVE CVE-2026-5588 https://www.cve.org/CVERecord?id=CVE-2026-5588 Référence CVE CVE-2026-60147 https://www.cve.org/CVERecord?id=CVE-2026-60147 Référence CVE CVE-2026-6918 https://www.cve.org/CVERecord?id=CVE-2026-6918 Référence CVE CVE-2026-8400 https://www.cve.org/CVERecord?id=CVE-2026-8400 Gestion détaillée du document le 04 septembre 2026 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr france.fr info.gouv.fr/risques Premier Ministre / Secrétariat Général de la Défense et de la Sécurité Nationale / Agence nationale de la sécurité des systèmes d'information

Official advisory
CERT-FR · French · CERTFR-2026-AVI-1094Multiples vulnérabilités dans les produits IBM

ERecord?id=CVE-2026-65900 Référence CVE CVE-2026-66053 https://www.cve.org/CVERecord?id=CVE-2026-66053 Référence CVE CVE-2026-66142 https://www.cve.org/CVERecord?id=CVE-2026-66142 Référence CVE CVE-2026-66143 https://www.cve.org/CVERecord?id=CVE-2026-66143 Référence CVE CVE-2026-66144 https://www.cve.org/CVERecord?id=CVE-2026-66144 Référence CVE CVE-2026-66373 https://www.cve.org/CVERecord?id=CVE-2026-66373 Référence CVE CVE-2026-6733 https://www.cve.org/CVERecord?id=CVE-2026-6733 Référence CVE CVE-2026-6734 https://www.cve.org/CVERecord?id=CVE-2026-6734 Référence CVE CVE-2026-6790 https://www.cve.org/CVERecord?id=CVE-2026-6790 Référence CVE CVE-2026-6918 https://www.cve.org/CVERecord?id=CVE-2026-6918 Référence CVE CVE-2026-69247 https://www.cve.org/CVERecord?id=CVE-2026-69247 Référence CVE CVE-2026-69248 https://www.cve.org/CVERecord?id=CVE-2026-69248 Référence CVE CVE-2026-69249 https://www.cve.org/CVERecord?id=CVE-2026-69249 Référence CVE CVE-2026-7246 https://www.cve.org/CVERecord?id=CVE-2026-7246 Référence CVE CVE-2026-75838 https://www.cve.org/CVERecord?id=CVE-2026-75838 Référence CVE CVE-2026-8177 https://www.cve.org/CVERecord?id=CVE-2026-8177 Référence CVE CVE-2026-8400 https://www.cve.org/CVERecord?id=CVE-2026-8400 Référence CVE CVE-2026-8646 https://www.cve.org/CVERecord?id=CVE-2026

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0901Multiples vulnérabilités dans les produits IBM

VERecord?id=CVE-2026-4867 Référence CVE CVE-2026-50645 https://www.cve.org/CVERecord?id=CVE-2026-50645 Référence CVE CVE-2026-53663 https://www.cve.org/CVERecord?id=CVE-2026-53663 Référence CVE CVE-2026-54269 https://www.cve.org/CVERecord?id=CVE-2026-54269 Référence CVE CVE-2026-54270 https://www.cve.org/CVERecord?id=CVE-2026-54270 Référence CVE CVE-2026-54285 https://www.cve.org/CVERecord?id=CVE-2026-54285 Référence CVE CVE-2026-5795 https://www.cve.org/CVERecord?id=CVE-2026-5795 Référence CVE CVE-2026-6321 https://www.cve.org/CVERecord?id=CVE-2026-6321 Référence CVE CVE-2026-6322 https://www.cve.org/CVERecord?id=CVE-2026-6322 Référence CVE CVE-2026-6918 https://www.cve.org/CVERecord?id=CVE-2026-6918 Référence CVE CVE-2026-7246 https://www.cve.org/CVERecord?id=CVE-2026-7246 Référence CVE CVE-2026-8408 https://www.cve.org/CVERecord?id=CVE-2026-8408 Référence CVE CVE-2026-9171 https://www.cve.org/CVERecord?id=CVE-2026-9171 Référence CVE CVE-2026-9322 https://www.cve.org/CVERecord?id=CVE-2026-9322 Gestion détaillée du document le 17 juillet 2026 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr france.fr info.gouv.fr/risques Premier Ministre / Secrétariat Général de la Défen

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0810Multiples vulnérabilités dans les produits IBM

ERecord?id=CVE-2026-42580 Référence CVE CVE-2026-42581 https://www.cve.org/CVERecord?id=CVE-2026-42581 Référence CVE CVE-2026-42583 https://www.cve.org/CVERecord?id=CVE-2026-42583 Référence CVE CVE-2026-42584 https://www.cve.org/CVERecord?id=CVE-2026-42584 Référence CVE CVE-2026-42585 https://www.cve.org/CVERecord?id=CVE-2026-42585 Référence CVE CVE-2026-42587 https://www.cve.org/CVERecord?id=CVE-2026-42587 Référence CVE CVE-2026-5588 https://www.cve.org/CVERecord?id=CVE-2026-5588 Référence CVE CVE-2026-5598 https://www.cve.org/CVERecord?id=CVE-2026-5598 Référence CVE CVE-2026-5795 https://www.cve.org/CVERecord?id=CVE-2026-5795 Référence CVE CVE-2026-6918 https://www.cve.org/CVERecord?id=CVE-2026-6918 Référence CVE CVE-2026-8149 https://www.cve.org/CVERecord?id=CVE-2026-8149 Référence CVE CVE-2026-9006 https://www.cve.org/CVERecord?id=CVE-2026-9006 Gestion détaillée du document le 26 juin 2026 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr france.fr info.gouv.fr/risques Premier Ministre / Secrétariat Général de la Défense et de la Sécurité Nationale / Agence nationale de la sécurité des systèmes d'information

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0788Multiples vulnérabilités dans les produits IBM

.cve.org/CVERecord?id=CVE-2026-6472 Référence CVE CVE-2026-6473 https://www.cve.org/CVERecord?id=CVE-2026-6473 Référence CVE CVE-2026-6474 https://www.cve.org/CVERecord?id=CVE-2026-6474 Référence CVE CVE-2026-6475 https://www.cve.org/CVERecord?id=CVE-2026-6475 Référence CVE CVE-2026-6477 https://www.cve.org/CVERecord?id=CVE-2026-6477 Référence CVE CVE-2026-6478 https://www.cve.org/CVERecord?id=CVE-2026-6478 Référence CVE CVE-2026-6479 https://www.cve.org/CVERecord?id=CVE-2026-6479 Référence CVE CVE-2026-6637 https://www.cve.org/CVERecord?id=CVE-2026-6637 Référence CVE CVE-2026-6638 https://www.cve.org/CVERecord?id=CVE-2026-6638 Référence CVE CVE-2026-6918 https://www.cve.org/CVERecord?id=CVE-2026-6918 Référence CVE CVE-2026-8646 https://www.cve.org/CVERecord?id=CVE-2026-8646 Référence CVE CVE-2026-8723 https://www.cve.org/CVERecord?id=CVE-2026-8723 Référence CVE CVE-2026-9006 https://www.cve.org/CVERecord?id=CVE-2026-9006 Référence CVE CVE-2026-9071 https://www.cve.org/CVERecord?id=CVE-2026-9071 Référence CVE CVE-2026-9311 https://www.cve.org/CVERecord?id=CVE-2026-9311 Référence CVE CVE-2026-9320 https://www.cve.org/CVERecord?id=CVE-2026-9320 Référence CVE CVE-2026-9330 https://www.cve.org/CVERecord?id=CVE-2026-9330 Gestion détaillée du document le 19 juin 2026 Version initiale Alertes Avis B

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0667Multiples vulnérabilités dans les produits IBM

.cve.org/CVERecord?id=CVE-2026-4786 Référence CVE CVE-2026-4800 https://www.cve.org/CVERecord?id=CVE-2026-4800 Référence CVE CVE-2026-4867 https://www.cve.org/CVERecord?id=CVE-2026-4867 Référence CVE CVE-2026-4923 https://www.cve.org/CVERecord?id=CVE-2026-4923 Référence CVE CVE-2026-4926 https://www.cve.org/CVERecord?id=CVE-2026-4926 Référence CVE CVE-2026-5121 https://www.cve.org/CVERecord?id=CVE-2026-5121 Référence CVE CVE-2026-5598 https://www.cve.org/CVERecord?id=CVE-2026-5598 Référence CVE CVE-2026-5795 https://www.cve.org/CVERecord?id=CVE-2026-5795 Référence CVE CVE-2026-6100 https://www.cve.org/CVERecord?id=CVE-2026-6100 Référence CVE CVE-2026-6918 https://www.cve.org/CVERecord?id=CVE-2026-6918 Référence CVE CVE-2026-8620 https://www.cve.org/CVERecord?id=CVE-2026-8620 Référence CVE CVE-2026-8633 https://www.cve.org/CVERecord?id=CVE-2026-8633 Gestion détaillée du document le 29 mai 2026 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr france.fr info.gouv.fr/risques Premier Ministre / Secrétariat Général de la Défense et de la Sécurité Nationale / Agence nationale de la sécurité des systèmes d'information

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0641Multiples vulnérabilités dans les produits IBM

ord?id=CVE-2026-34282 Référence CVE CVE-2026-35554 https://www.cve.org/CVERecord?id=CVE-2026-35554 Référence CVE CVE-2026-35611 https://www.cve.org/CVERecord?id=CVE-2026-35611 Référence CVE CVE-2026-3713 https://www.cve.org/CVERecord?id=CVE-2026-3713 Référence CVE CVE-2026-40175 https://www.cve.org/CVERecord?id=CVE-2026-40175 Référence CVE CVE-2026-41676 https://www.cve.org/CVERecord?id=CVE-2026-41676 Référence CVE CVE-2026-41677 https://www.cve.org/CVERecord?id=CVE-2026-41677 Référence CVE CVE-2026-41678 https://www.cve.org/CVERecord?id=CVE-2026-41678 Référence CVE CVE-2026-41681 https://www.cve.org/CVERecord?id=CVE-2026-41681 Référence CVE CVE-2026-6918 https://www.cve.org/CVERecord?id=CVE-2026-6918 Gestion détaillée du document le 22 mai 2026 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr france.fr info.gouv.fr/risques Premier Ministre / Secrétariat Général de la Défense et de la Sécurité Nationale / Agence nationale de la sécurité des systèmes d'information

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
0.21 < 0.59
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 5 May 2026 · Last source change 15 Jul 2026, 00:40 UTC · CWE-125 · Out-of-bounds Read

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-27315
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2026-27315↗CISA Vulnrichment SSVC evidence↗Public exploit reference↗Patch or update reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-6918 · cve.blacktree.nl