How severe is CVE-2026-33891?

CVE-2026-33891 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-33891 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33891?

CVE-2026-33891 affects Digitalbazaar Forge. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33891?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-33891 have an EU (EUVD) identifier?

Yes. CVE-2026-33891 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16833.

When was CVE-2026-33891 published?

CVE-2026-33891 was published on 2026-03-27 and last updated on 2026-07-02.

CVE-2026-33891

CVE-2026-33891 is a high-severity vulnerability in Digitalbazaar Forge with a CVSS 3.x base score of 7.5. 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-835.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16833
Weakness: CWE-835
Affected product: Digitalbazaar Forge
Published: 2026-03-27
Last modified: 2026-07-02

Description

Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. Prior to version 1.4.0, a Denial of Service (DoS) vulnerability exists in the node-forge library due to an infinite loop in the BigInteger.modInverse() function (inherited from the bundled jsbn library). When modInverse() is called with a zero value as input, the internal Extended Euclidean Algorithm enters an unreachable exit condition, causing the process to hang indefinitely and consume 100% CPU. Version 1.4.0 patches the issue.

Frequently asked questions

What is CVE-2026-33891?: Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. Prior to version 1.4.0, a Denial of Service (DoS) vulnerability exists in the node-forge library due to an infinite loop in the BigInteger.modInverse() function (inherited from the bundled jsbn library). When modInverse() is called with a zero value as input, the internal Extended Euclidean Algorithm enters an unreachable exit condition, causing the process to hang indefinitely and consume 100% CPU. Version 1.4.0 patches the issue.
How severe is CVE-2026-33891?: CVE-2026-33891 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-33891 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33891?: CVE-2026-33891 affects Digitalbazaar Forge. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33891?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-33891 have an EU (EUVD) identifier?: Yes. CVE-2026-33891 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16833.
When was CVE-2026-33891 published?: CVE-2026-33891 was published on 2026-03-27 and last updated on 2026-07-02.

References

Affected products (1)

cpe:2.3:a:digitalbazaar:forge:*:*:*:*:*:node.js:*:*

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