CVE-2026-123831EUVD-2026-118334GHSA-3HCX-X64H-4M2V
In JetBrains CLion before 2026.2, 2026.1.4 code execution was possible in Safe Mode via Meson project settings
A 0-10 score for how bad the bug is in the worst case. It does not say how common the affected setup is.What do these mean? →9.6CriticalCNA
- Exploited
- No known exploitation
- Fix
- No fix listed
- Who is exposed
- Not reported
- 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? →
- 22/100 · 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
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
JetBrains CLion is affected by a flaw that allows code execution while Safe Mode is active, triggered through Meson project settings. An attacker can reach it remotely without logging in, but a user must take an action such as opening a crafted project for the attack to succeed.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
Read the original description
In JetBrains CLion before 2026.2, 2026.1.4 code execution was possible in Safe Mode via Meson project settings
cve.now Index
22Pcve.now Index 22 of 100 · methodology v3 · provisional
- Exploitation0/40No signal
- Exposure7/25Reachable over the network without a login · Unknown: No advisory context yet
- Reach?/20Unknown. No tracked technology or package matched
- Severity10/10CVSS 9.6, total technical impact per CISA
- No patch5/5No patch listed yet
What would change the score
- Would score about 77 if added to CISA KEV
- Would score about 72 if CISA's SSVC rates exploitation active
- Would score about 37 if advisories confirm default setups are exposed
Timeline
- CVE published
- First seen by cve.now
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
- Posted on X by cve.now
Affected versions
- JetBrains CLion
Version range not reported
Evidence 1
- Link
Corrections
None so far.
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