ThingLinks vulnerable to authenticated remote code execution via Groovy script registration in ThingLinks

published 2026-10-30 9 d ago modified 2026-11-06 2 d ago also EUVD-2026-114455

cvss: 9.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits: 0; none known

ThingLinks is an enterprise IoT platform. Prior to 1.4.0, the `/groovyScriptTest/registerScript` endpoint accepts user-supplied Groovy script content and passes it to an unsandboxed `Groovy compilation and loading` flow. An authenticated attacker can provide code that is compiled and instantiated on the server, resulting in arbitrary server-side code execution. The issue affects the `rule engine`'s Groovy script test/register flow. This issue is fixed in version 1.4.0.

Patch / fix

links 2

github.com/mqttsnet/thinglinks@311ee76 commit
github.com/mqttsnet/thinglinks/releases/tag/v1.4.0 release

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 d ago (2026-11-06)

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.9	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

mqttsnet thinglinks

Classification

Weakness

CWE-78 Improper Neutralization of Special Elements used in an OS Command
CWE-94 Improper Control of Generation of Code

References

Sources

CVE List CVE-2026-62853
NVD CVE-2026-62853

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary