Forge has signature forgery in RSA-PKCS due to ASN.1 extra field

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Summary

CVECVE-2026-33894
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-27 21:17:25 UTC
Updated2026-07-02 12:17:07 UTC
DescriptionForge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. Prior to version 1.4.0, RSASSA PKCS#1 v1.5 signature verification accepts forged signatures for low public exponent keys (e=3). Attackers can forge signatures by stuffing “garbage” bytes within the ASN structure in order to construct a signature that passes verification, enabling Bleichenbacher style forgery. This issue is similar to CVE-2022-24771, but adds bytes in an addition field within the ASN structure, rather than outside of it. Additionally, forge does not validate that signatures include a minimum of 8 bytes of padding as defined by the specification, providing attackers additional space to construct Bleichenbacher forgeries. Version 1.4.0 patches the issue.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS: 0.003390000 probability, percentile 0.258570000 (date 2026-07-04)

Problem Types: CWE-20 | CWE-347 | CWE-347 CWE-347: Improper Verification of Cryptographic Signature | CWE-20 CWE-20: Improper Input Validation | CWE-347 Improper Verification of Cryptographic Signature

VersionSourceTypeScoreSeverityVector
3.1ADPCVSS7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
3.10b0ca135-0b70-47e7-9f44-1890c2a1c46cSecondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Digitalbazaar Forge All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Digitalbazaar Forge affected < 1.4.0 Not specified
ADP Red Hat Red Hat Ansible Automation Platform 2.5 For RHEL 8 Not specified Not specified
ADP Red Hat Red Hat Ansible Automation Platform 2.5 For RHEL 9 Not specified Not specified
ADP Red Hat Cluster Observability Operator 1.5.0 Not specified Not specified
ADP Red Hat Red Hat Developer Hub 1.8 Not specified Not specified
ADP Red Hat Red Hat Developer Hub 1.9 Not specified Not specified
ADP Red Hat Red Hat Quay 3.10 Not specified Not specified
ADP Red Hat Red Hat Quay 3.12 Not specified Not specified
ADP Red Hat Red Hat Quay 3.14 Not specified Not specified
ADP Red Hat Red Hat Quay 3.15 Not specified Not specified
ADP Red Hat Red Hat Quay 3.16 Not specified Not specified
ADP Red Hat Red Hat Quay 3.17 Not specified Not specified
ADP Red Hat Red Hat Quay 3.9 Not specified Not specified
ADP Red Hat Logging Subsystem For Red Hat OpenShift Not specified Not specified
ADP Red Hat Red Hat Ansible Automation Platform 2 Not specified Not specified
ADP Red Hat Red Hat Build Of Apicurio Registry 2 Not specified Not specified
ADP Red Hat Red Hat Build Of Podman Desktop Not specified Not specified
ADP Red Hat Red Hat Data Grid 8 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 9 Not specified Not specified
ADP Red Hat Red Hat Fuse 7 Not specified Not specified
ADP Red Hat Cryostat 4 Not specified Not specified
ADP Red Hat Red Hat Build Of Apache Camel - HawtIO 4 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 10 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 8 Not specified Not specified
ADP Red Hat Red Hat Process Automation 7 Not specified Not specified

References

ReferenceSourceLinkTags
github.com/digitalbazaar/forge/security/advisories/GHSA-ppp5-5v6c-4jwp [email protected] github.com Vendor Advisory
access.redhat.com/errata/RHSA-2026:24853 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:22629 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:34342 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
www.rfc-editor.org/rfc/rfc8017.html [email protected] www.rfc-editor.org Third Party Advisory
access.redhat.com/errata/RHSA-2026:21017 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
bugzilla.redhat.com/show_bug.cgi 0b0ca135-0b70-47e7-9f44-1890c2a1c46c bugzilla.redhat.com
access.redhat.com/errata/RHSA-2026:9742 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33894.json 0b0ca135-0b70-47e7-9f44-1890c2a1c46c security.access.redhat.com
datatracker.ietf.org/doc/html/rfc2313 [email protected] datatracker.ietf.org Third Party Advisory
access.redhat.com/errata/RHSA-2026:19375 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:22465 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:13826 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:23361 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:24761 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
mailarchive.ietf.org/arch/msg/openpgp/5rnE9ZRN1AokBVj3VqblGlP63QE [email protected] mailarchive.ietf.org Third Party Advisory
access.redhat.com/security/cve/CVE-2026-33894 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
access.redhat.com/errata/RHSA-2026:22840 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
ADP2026-03-27T21:02:52.462ZReported to Red Hat.
ADP2026-03-27T20:45:49.583ZMade public.

Solutions

ADP: RHSA-2026:24761: Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9

ADP: RHSA-2026:34342: Cluster Observability Operator 1.5.0

ADP: RHSA-2026:9742: Red Hat Developer Hub 1.8

ADP: RHSA-2026:13826: Red Hat Developer Hub 1.9

ADP: RHSA-2026:22840: Red Hat Quay 3.10

ADP: RHSA-2026:22629: Red Hat Quay 3.12

ADP: RHSA-2026:21017: Red Hat Quay 3.14

ADP: RHSA-2026:24853: Red Hat Quay 3.15

ADP: RHSA-2026:19375: Red Hat Quay 3.16

ADP: RHSA-2026:22465: Red Hat Quay 3.17

ADP: RHSA-2026:23361: Red Hat Quay 3.9

Workarounds

ADP: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

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