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CVE-2026-123858VulnerabilityPublished

In JetBrains PhpStorm before 2026.3 project files could be automatically uploaded to a deployment server from

Source GCVE Database

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Authoritative record:CVE-2026-123858· Medium 4.4

Not known to be exploited · CVSS 4.4 Medium : upgrade to 2026.3 when convenient.

Data as of 6 Nov 2026, 19:05 UTC

CVSS 3.1 base score
4.4Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (JetBrains)CVSS 3.14.4
Patch
Available – fixed in 2026.3
CVSS:3.1/AV:L/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 6 Nov 2026.

What to do

Upgrade PhpStorm to 2026.3.

Affected software

ProductAffectedFixed in
JetBrainsPhpStormAffected
  • <2026.3
Fixed in
  • 2026.3

AI-suggested

Since the vulnerability affects versions before 2026.3, upgrading to version 2026.3 or later is recommended once available. Until then, users should exercise caution when opening untrusted projects and consider disabling automatic deployment features to prevent unintended uploads.

Description

A vulnerability in JetBrains PhpStorm before version 2026.3 allows project files to be automatically uploaded to a deployment server from untrusted projects. This behavior could lead to unintended information disclosure or modification. The issue has a medium severity with a CVSS score of 4.4.

References

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