In JetBrains IntelliJ IDEA before 2026.3 path traversal was possible via JSON Schema references in untrusted projects
- Exploited
- No known exploitation
- Fix
- Fixed in 2026.3
- Who is exposed
- Not reported
Do first: Upgrade to a fixed version: 2026.3.
- Last modified
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 3/100 · provisional
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
JetBrains IntelliJ IDEA is affected by a path traversal flaw in how it handles JSON Schema references inside untrusted projects. An attacker who can get a local user to open such a project, which requires that user to take an action, could read limited data from the local system.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
Read the original description
In JetBrains IntelliJ IDEA before 2026.3 path traversal was possible via JSON Schema references in untrusted projects
cve.now Index
- Exploitation0/40No signal
- Exposure?/25Unknown. No advisory context yet
- Reach?/20Unknown. No tracked technology or package matched
- Severity3.3/10CVSS 3.3
- No patch0/5No signal
What would change the score
- Would score about 58 if added to CISA KEV
- Would score about 53 if CISA's SSVC rates exploitation active
- Would score about 25 if advisories confirm default setups are exposed
What to do
Upgrade to a fixed version: 2026.3.
Timeline
- CVE published
- First seen by cve.now
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- JetBrains IntelliJ IDEA
fixed in 2026.3
Evidence 1
- Link
Corrections
None so far.
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Questions about CVE-2026-123845
Is CVE-2026-123845 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
Which versions are affected by CVE-2026-123845?
IntelliJ IDEA: before 2026.3.Source: cve.now feed data
How do I fix CVE-2026-123845?
Upgrade to a fixed version: 2026.3.Source: cve.now feed data