9.1

CVE-2026-33896: digitalbazaar forge Improper Certificate Validation

CVSS: 9.1v3.1CriticalModified
AliasesUBUNTU-CVE-2026-33896CGA-2v3g-38g7-mfcjCGA-3362-996j-7vwf
Published 27-03-2026Last modified 04-09-2026
Open JSON

Vulnerability summary

CVE-2026-33896 is a critical (CVSS 9.1) Improper Certificate Validation vulnerability in digitalbazaar forge. EPSS estimates a 0.50% chance of exploitation in the next 30 days, higher than 41.5% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (NVD)
EPSS score
0.50%
0%100%
Low · +0.15 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
RHSA-2026:24761CGA-C78V-8M2F-P7GW

Timeline

  1. 27-03-2026
    PublishedVulnerability first disclosed.
  2. 04-09-2026
    Last modifiedVulnerability information updated.

Description

Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. Prior to version 1.4.0, `pki.verifyCertificateChain()` does not enforce RFC 5280 basicConstraints requirements when an intermediate certificate lacks both the `basicConstraints` and `keyUsage` extensions. This allows any leaf certificate (without these extensions) to act as a CA and sign other certificates, which node-forge will accept as valid. Version 1.4.0 patches the issue.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.50%

Chance of exploitation in the next 30 days

Percentile

42%

Versus all other CVEs

30-day change

+0.15 pp

From 0.35% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.50%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Forge

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Chainguard59 products
  • arangodb-3.11< 3.11.14.4-r10
  • arangodb-3.12< 3.12.9.4-r4
  • gitlab-rails-ce-18.1< 18.1.6-r25
  • gitlab-rails-ce-18.10All versions (No fix recorded)
  • gitlab-rails-ce-18.11< 18.11.6-r7
Wolfi13 products
  • katib-earlystopping< 0.19.0-r31
  • katib-suggestion-goptuna-compatAll versions (No fix recorded)
  • katib-suggestion-hyperband< 0.19.0-r31
  • katib-suggestion-hyperopt< 0.19.0-r40 | < 0.19.0-r31
  • katib-suggestion-nas-darts< 0.19.0-r31
Digitalbazaar1 product
Npm1 product
  • node-forge< 1.4.0
Ubuntu1 product
  • node-node-forgeAll versions (No fix recorded)

5 vendors · 75 products

References

14 links
Show all 14 references