CriticalCVE-2026-118697

    JetBrains Toolbox App: Improper Certificate Validation (CVE-2026-118697)

    Published Last modified Sources: pwn.watch, CVE.org, BSI

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    What is affected, what to do

    In JetBrains Toolbox App before 3.9.1 and 3.8.2; IntelliJ IDEA, PyCharm, PhpStorm, RubyMine, WebStorm, GoLand and Rider before 2026.3 and 2026.2.4; CLion before 2026.3 and 2026.2.4.1; DataGrip before 2026.3 and 2026.2.6.1; RustRover before 2026.3 and 2026.2.5, the jetbrainsd daemon trusted compromised intermediate certificates

    Update JetBrains Toolbox App to version 3.9.1, JetBrains Toolbox App to version 3.8.2, JetBrains IntelliJ IDEA to version 2026.2.4.

    Affected
    • JetBrains Toolbox App lt 3.9..3.9.1
    • JetBrains Toolbox App lt *..3.8.2
    • JetBrains IntelliJ IDEA lt *..2026.2.4
    • JetBrains PyCharm lt *..2026.2.4
    • JetBrains PhpStorm lt *..2026.2.4
    • JetBrains RubyMine lt *..2026.2.4
    • JetBrains WebStorm lt *..2026.2.4
    • JetBrains GoLand lt *..2026.2.4
    • JetBrains Rider lt *..2026.2.4
    • JetBrains CLion lt *..2026.2.4.1
    • JetBrains DataGrip lt *..2026.2.6.1
    • JetBrains RustRover lt *..2026.2.5
    Fixed in
    • JetBrains Toolbox App 3.9.1
    • JetBrains Toolbox App 3.8.2
    • JetBrains IntelliJ IDEA 2026.2.4
    • JetBrains PyCharm 2026.2.4
    • JetBrains PhpStorm 2026.2.4
    • JetBrains RubyMine 2026.2.4
    • JetBrains WebStorm 2026.2.4
    • JetBrains GoLand 2026.2.4
    • JetBrains Rider 2026.2.4
    • JetBrains CLion 2026.2.4.1
    • JetBrains DataGrip 2026.2.6.1
    • JetBrains RustRover 2026.2.5

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    9.0

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: Vendor (CNA), CVSS v3

    9.0

    CVSS v3

    Severity Critical on the scale from 0 to 10.

    Source: pwn.watch, CVE.org, BSI

    0.3 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 21.8

    Show all metrics
    Severity
    Critical
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    78.79 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    no public PoC known
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    9.0 Methodology
    CVSS v3

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    9.0
    EPSS score

    The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.

    Read in glossary
    0.3 %
    Low — model estimates < 1% exploitation likelihood.
    EPSS percentile

    The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.

    Read in glossary
    21.8
    Elevated — this CVE ranks above at least 10% of all CVEs scored today.
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    —
    Published
    CISA assessment (SSVC)
    Exploitation: none known · not automatable · Technical impact: total
    Source: CISA Vulnrichment, as of 30 October 2026
    CWE

    CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.

    Read in glossary
    CWE-295

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    Description

    In JetBrains Toolbox App before 3.9.1 and 3.8.2; IntelliJ IDEA, PyCharm, PhpStorm, RubyMine, WebStorm, GoLand and Rider before 2026.3 and 2026.2.4; CLion before 2026.3 and 2026.2.4.1; DataGrip before 2026.3 and 2026.2.6.1; RustRover before 2026.3 and 2026.2.5, the jetbrainsd daemon trusted compromised intermediate certificates

    Source: pwn.watch, cvelistv5, BSI CSAF, BSI WID Portal, NVD (NIST)

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    Affected versionsFixed in
    JetBrainsCLion
    • < 2026.2.4.1
    • 2026.2.4.1
    JetBrainsDataGrip
    • < 2026.2.6.1
    • 2026.2.6.1
    JetBrainsGoLand
    • < 2026.2.4
    • 2026.2.4
    JetBrainsIntelliJ IDEA
    • < 2026.2.4
    • < 2026.2.4
    • < 2026.3
    • 2026.2.4
    • 2026.2.4
    • 2026.3
    JetBrainsPhpStorm
    • < 2026.2.4
    • 2026.2.4
    JetBrainsPyCharm
    • < 2026.2.4
    • 2026.2.4
    JetBrainsRider
    • < 2026.2.4
    • 2026.2.4
    JetBrainsRubyMine
    • < 2026.2.4
    • 2026.2.4
    JetBrainsRustRover
    • < 2026.2.5
    • 2026.2.5
    JetBrainsToolbox App
    • 3.9 – < 3.9.1
    • < 3.8.2
    • < 3.8.2
    • < 3.9.1
    • 3.9.1
    • 3.8.2
    • 3.8.2
    • 3.9.1
    JetBrainsWebStorm
    • < 2026.2.4
    • 2026.2.4

    Vendors and products

    Weakness classes (CWE)

    • CWE-295Improper Certificate Validation

      Base

      The product does not validate, or incorrectly validates, a certificate.

      Entry at MITRE CWE-295

    References & sources

    • blog.jetbrains.comCompromised eMudhra Certificates: Update Your JetBrains IDEs, ReSharper, .NET Tools, Toolbox App, and Gateway Nowpwn-watch
    • bugzilla.mozilla.orgBug 2083449 - eMudhra: Private key compromise of Intermediate Certificatespwn-watch
    • emudhra.comeMudhra statement on certificate security incidentpwn-watch
    • jetbrains.comprivacy-security/issues-fixed
    • pwn.watchpwn.watch: eMudhra intermediate CA private keys compromisedpwn-watch
    • CVE.org (MITRE)CVE-2026-113812: Mozilla::CA for Perl bundles a root linked to compromised intermediatespwn-watch
    • metacpan.orgMozilla-CA 20261020 changespwn-watch
    • github.comSparrow Wallet 2.5.6 release notes: Java v25.0.5 upgrade removes the eMudhra root certificates from the bundled certificate storepwn-watch
    • github.comcert-manager v1.20.5 release notespwn-watch
    • checkmk.comWerk #22623: Update certifi to remove untrusted eMudhra (emSign) root CA certificatespwn-watch
    • github.comTeku 26.10.3 release notespwn-watch
    • github.comBesu 26.10.2 release notespwn-watch
    • coindesk.comEthereum clients patch flaw that could let attackers redirect ether rewardspwn-watch
    • bleepingcomputer.comMicrosoft releases Windows OOB updates to distrust eMudhra certificatespwn-watch
    • theregister.comMicrosoft releases out-of-band Windows fixes with certificate updatespwn-watch
    • support.microsoft.comOctober 26, 2026 KB5134133 (OS Builds 26300.9725, 26200.9725 and 26100.9725) Out-of-bandpwn-watch
    • go.devOur Response To The eMudhra Key Disclosure Incidentpwn-watch
    • socket.deveMudhra, Brotli, and the Long Tail of a Security Fixpwn-watch
    • tailscale.comTS-2026-013: Leaked private keys for eMudhra TLS intermediate certificatespwn-watch
    • NVD (NIST)CVE-2026-115930: MongoDB Shell (mongosh) trusts recoverable eMudhra intermediate CAspwn-watch

    Changes to this CVE

    Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

    1. Record modifiedjetbrains.com

      Description added or changed

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Descriptionchanged
      In JetBrains Toolbox App before 3.9.1 and 3.8.2; IntelliJ IDEA before 2026.3 and 2026.2.4, the jetbrainsd daemon trusted compromised intermediate certificates
      In JetBrains Toolbox App before 3.9.1 and 3.8.2; IntelliJ IDEA, PyCharm, PhpStorm, RubyMine, WebStorm, GoLand and Rider before 2026.3 and 2026.2.4; CLion before 2026.3 and 2026.2.4.1; DataGrip before 2026.3 and 2026.2.6.1; RustRover before 2026.3 and 2026.2.5, the jetbrainsd daemon trusted compromised intermediate certificates
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/118xxx/CVE-2026-118697.json">CVE-2026-118697</a>

      Source identifier: cve@jetbrains.com

    2. Record modifiedCISA ADP

      CISA assessment (SSVC): exploitation: none known, automatable: no

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      SSVC assessmentremoved
      {"id":"CVE-2026-118697","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-30T18:03:57.101027Z"}
      —
      SSVC assessmentadded
      —
      {"id":"CVE-2026-118697","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-30T00:00:00+00:00"}

      Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

    3. Record modifiedCISA ADP

      CISA assessment (SSVC): exploitation: none known, automatable: no

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      SSVC assessmentadded
      —
      {"id":"CVE-2026-118697","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-30T18:03:57.101027Z"}

      Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

    4. Receivedjetbrains.com

      CVSS V3.1: AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

      Weakness type: CWE-295

      Description added or changed

      Show 8 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Descriptionadded
      —
      In JetBrains Toolbox App before 3.9.1 and 3.8.2; IntelliJ IDEA before 2026.3 and 2026.2.4, the jetbrainsd daemon trusted compromised intermediate certificates
      CVSSadded
      —
      AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
      Weakness type (CWE)added
      —
      CWE-295
      Affected versions (publisher)added
      —
      New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/118xxx/CVE-2026-118697.json">CVE-2026-118697</a>
      Referenceadded
      —
      https://blog.jetbrains.com/security/2026/10/compromised-emudhra-certificates-ides/
      Referenceadded
      —
      https://bugzilla.mozilla.org/show_bug.cgi?id=2083449
      Referenceadded
      —
      https://emudhra.com/en/post/certificate-security-incident
      Referenceadded
      —
      https://www.jetbrains.com/privacy-security/issues-fixed/

      Source identifier: cve@jetbrains.com

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