How severe is CVE-2026-44003?

CVE-2026-44003 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-44003 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-44003?

CVE-2026-44003 affects Vm2 Project Vm2. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-44003?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-44003 have an EU (EUVD) identifier?

Yes. CVE-2026-44003 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30073.

When was CVE-2026-44003 published?

CVE-2026-44003 was published on 2026-05-13 and last updated on 2026-06-17.

CVE-2026-44003

CVE-2026-44003 is a medium-severity vulnerability in Vm2 Project Vm2 with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-693.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30073
Weakness: CWE-693
Affected product: Vm2 Project Vm2
Published: 2026-05-13
Last modified: 2026-06-17

Description

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, vm2's code transformer has a performance optimization that skips AST analysis when the code does not contain catch, import, or async keywords. This fast-path bypass allows sandboxed code to directly access the internal VM2_INTERNAL_STATE_DO_NOT_USE_OR_PROGRAM_WILL_FAIL variable, which exposes internal security functions (handleException, wrapWith, import). This vulnerability is fixed in 3.11.0.

Frequently asked questions

What is CVE-2026-44003?: vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, vm2's code transformer has a performance optimization that skips AST analysis when the code does not contain catch, import, or async keywords. This fast-path bypass allows sandboxed code to directly access the internal VM2_INTERNAL_STATE_DO_NOT_USE_OR_PROGRAM_WILL_FAIL variable, which exposes internal security functions (handleException, wrapWith, import). This vulnerability is fixed in 3.11.0.
How severe is CVE-2026-44003?: CVE-2026-44003 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-44003 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-44003?: CVE-2026-44003 affects Vm2 Project Vm2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-44003?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-44003 have an EU (EUVD) identifier?: Yes. CVE-2026-44003 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30073.
When was CVE-2026-44003 published?: CVE-2026-44003 was published on 2026-05-13 and last updated on 2026-06-17.

References

https://github.com/patriksimek/vm2/security/advisories/GHSA-wp5r-2gw5-m7q7

Affected products (1)

cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:node.js:*:*

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