Eclipse Theia up to 1.70.x Repository inclusion of functionality from untrusted control sphere

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6.9	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Eclipse Theia up to 1.70.x and classified as problematic. This impacts an unknown function of the component Repository Handler. Performing a manipulation results in Local Privilege Escalation. This vulnerability is cataloged as CVE-2026-44688. The attack must be initiated from a local position. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in Eclipse Theia up to 1.70.x. This affects an unknown part of the component Repository Handler. The manipulation with an unknown input leads to a local privilege escalation vulnerability. CWE is classifying the issue as CWE-829. The product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In Eclipse Theia versions prior to 1.71.0, the AI chat agent processed workspace file and directory names as part of its prompt context without distinguishing them from system instructions. An attacker could craft a malicious repository with adversarial directory or file names that, when analyzed by the AI agent, would cause the agent to follow attacker-controlled instructions (indirect prompt injection). Combined with other AI chat features available in untrusted workspaces, this enabled attack chains leading to data exfiltration via Markdown image rendering or arbitrary command execution via task definitions.

The weakness was shared by Piotr Ryciak. The advisory is shared at gitlab.eclipse.org. This vulnerability is uniquely identified as CVE-2026-44688 since 05/22/2026. The exploitability is told to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 321770 (Linux Distros Unpatched Vulnerability : CVE-2026-44688), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.71.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (321770) and EUVD (EUVD-2026-37898). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Eclipse

Name

• Theia

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26
• 1.27
• 1.28
• 1.29
• 1.30
• 1.31
• 1.32
• 1.33
• 1.34
• 1.35
• 1.36
• 1.37
• 1.38
• 1.39
• 1.40
• 1.41
• 1.42
• 1.43
• 1.44
• 1.45
• 1.46
• 1.47
• 1.48
• 1.49
• 1.50
• 1.51
• 1.52
• 1.53
• 1.54
• 1.55
• 1.56
• 1.57
• 1.58
• 1.59
• 1.60
• 1.61
• 1.62
• 1.63
• 1.64
• 1.65
• 1.66
• 1.67
• 1.68
• 1.69
• 1.70

License

• open-source

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 6.9

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Inclusion of functionality from untrusted control sphere
CWE: CWE-829
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 321770
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-44688

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Theia 1.71.0

Timelineinfo

05/22/2026 CVE reserved
06/18/2026 +27 days Advisory disclosed
06/18/2026 +0 days VulDB entry created
06/24/2026 +6 days VulDB entry last update

Sourcesinfo

Advisory: gitlab.eclipse.org
Researcher: Piotr Ryciak
Status: Confirmed

CVE: CVE-2026-44688 (🔒)
GCVE (CVE): GCVE-0-2026-44688
GCVE (VulDB): GCVE-100-372249
EUVD: 🔒

Entryinfo

Created: 06/18/2026 19:53
Updated: 06/24/2026 10:38
Changes: 06/18/2026 19:53 (66), 06/19/2026 08:17 (1), 06/22/2026 06:31 (2), 06/24/2026 10:38 (13)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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