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VulnerabilityPublished

CVE-2026-123310: JetBrains IntelliJ IDEA · Server-Side Request Forgery

Affects JetBrains IntelliJ IDEASource CVE Database V5

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Not known to be exploited · CVSS 5.4 Medium : upgrade to 2026.3 when convenient.

Data as of 6 Nov 2026, 11:02 UTC

CVSS 3.1 base score
5.4Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (JetBrains)CVSS 3.15.4
Patch
Available – fixed in 2026.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Upgrade JetBrains IntelliJ IDEA to 2026.3.

Affected software

ProductAffectedFixed in
JetBrainsIntelliJ IDEAAffected
  • <2026.3
Fixed in
  • 2026.3

AI-suggested

Upgrade IntelliJ IDEA to version 2026.3 or later, where this vulnerability is fixed. No other mitigation or workaround is indicated by the vendor advisory.

Description

CVE-2026-123310 is a server-side request forgery (SSRF) vulnerability in JetBrains IntelliJ IDEA affecting versions before 2026.3. Kotlin scripts in untrusted projects could trigger dependency downloads from arbitrary repositories, potentially allowing attackers to induce the IDE to make unintended network requests. The issue is fixed in version 2026.3.

References

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