TI-2026-86016 Aliases CVE-2026-123857 GHSA-x28h-qvqp-4h33

XML external entity injection in JetBrains PhpStorm via PHPMD

LOW 20CWE-611Published 2026-11-06 · Updated 2026-11-06

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-611 and the CVSS impact.

Summary

JetBrains PhpStorm before 2026.3 is affected. An XML external entity (XXE) flaw (CWE-611) lets untrusted projects read data through PHPMD ruleset autodetection. An attacker must get a user to open a crafted project, and user interaction is required. The CVSS 3.1 score is 4.3 (medium).

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

In JetBrains PhpStorm before 2026.3 xXE was possible in untrusted projects via PHPMD ruleset autodetection

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00256 17th percentileScored 2026-11-07

Fix Fixed PhpStorm (JetBrains): 2026.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
JetBrains	PhpStorm	before 2026.3	2026.3	Patch available	CNA

PhpStorm VendorJetBrains Affected before 2026.3 Fixed in 2026.3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:jetbrains:phpstorm::::::::	—	—	JetBrains

cpe:2.3:a:jetbrains:phpstorm:*:*:*:*:*:*:*:* Versions — — ·JetBrains

Remediation

Upgrade JetBrains PhpStorm to version 2026.3 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Fix · CNA PhpStorm (JetBrains) Fixed in 2026.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-11-06
JetBrains PhpStorm 2026.3
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-86017 Untrusted projects trigger automatic uploads in JetBrains PhpStormPriority LOW 19
Show all 2 records →

Timeline

2026-11-06 Threatist record created from CVE-2026-123857
2026-11-06 CISA SSVC decision points changed
2026-11-06 Alias added: GHSA-x28h-qvqp-4h33

References

Other 1

https://www.jetbrains.com/privacy-security/issues-fixed/

TI-2026-45031 Deserialization of untrusted data in JetBrains TeamCity KEVCVSS 3.1CRITICAL 9.8
TI-2024-18053 In JetBrains TeamCity before 2023.11.4 authentication bypass allowing to perform admin actions was possible KEVCVSS 3.1CRITICAL 9.8
TI-2023-22884 In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible KEVCVSS 3.1CRITICAL 9.8
TI-2024-18054 In JetBrains TeamCity before 2023.11.4 path traversal allowing to perform limited admin actions was possible KEVCVSS 3.1HIGH 7.3
TI-2024-15905 In JetBrains TeamCity before 2023.11.3 authentication bypass leading to RCE was possible CVSS 3.1CRITICAL 9.8
TI-2024-24589 Insufficiently protected credentials in JetBrains IntelliJ IDEA CVSS 3.1CRITICAL 9.3

See all 787 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences