CVE-2026-4600
Apache Commons Crypto DSA Signature Forgery
Description
Versions of the package jsrsasign before 11.1.1 are vulnerable to Improper Verification of Cryptographic Signature via the DSA domain-parameter validation in KJUR.crypto.DSA.setPublic (and the related DSA/X509 verification flow in src/dsa-2.0.js). An attacker can forge DSA signatures or X.509 certificates that X509.verifySignature() accepts by supplying malicious domain parameters such as g=1, y=1, and a fixed r=1, which make the verification equation true for any hash.
INFO
Published Date :
March 23, 2026, 6:16 a.m.
Last Modified :
July 1, 2026, 1:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-4600
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | HIGH | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Update jsrsasign package to version 11.1.1 or later.
- Ensure DSA domain parameters are validated properly.
- Review related DSA/X509 verification flows.
Public PoC/Exploit Available at Github
CVE-2026-4600 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-4600.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-4600 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-4600
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Tracking Vulnerabilities That Appear to be Credited to the Anthropic Research Team
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-4600 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-4600 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Jul. 01, 2026
Action Type Old Value New Value Changed Affected [{'cpes': ['cpe:/a:redhat:migration_toolkit_virtualization:2.10::el9'], 'vendor': 'Red Hat', 'product': 'Migration Toolkit for Virtualization 2.1', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:migration_toolkit_virtualization:2.9::el9'], 'vendor': 'Red Hat', 'product': 'Migration Toolkit for Virtualization 2.9', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:quay:3.12::el8'], 'vendor': 'Red Hat', 'product': 'Red Hat Quay 3.12', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:quay:3.15::el8'], 'vendor': 'Red Hat', 'product': 'Red Hat Quay 3.15', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:quay:3.16::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat Quay 3.16', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:quay:3.10::el8'], 'vendor': 'Red Hat', 'product': 'Red Hat Quay 3.1', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:quay:3.9::el8'], 'vendor': 'Red Hat', 'product': 'Red Hat Quay 3.9', 'defaultStatus': 'affected'}] [{'cpes': ['cpe:/a:redhat:migration_toolkit_virtualization:2.10::el9'], 'vendor': 'Red Hat', 'product': 'Migration Toolkit for Virtualization 2.1', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:migration_toolkit_virtualization:2.9::el9'], 'vendor': 'Red Hat', 'product': 'Migration Toolkit for Virtualization 2.9', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:quay:3.10::el8'], 'vendor': 'Red Hat', 'product': 'Red Hat Quay 3.10', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:quay:3.12::el8'], 'vendor': 'Red Hat', 'product': 'Red Hat Quay 3.12', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:quay:3.15::el8'], 'vendor': 'Red Hat', 'product': 'Red Hat Quay 3.15', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:quay:3.16::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat Quay 3.16', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:quay:3.9::el8'], 'vendor': 'Red Hat', 'product': 'Red Hat Quay 3.9', 'defaultStatus': 'affected'}] -
CVE Modified by 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Jun. 30, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:/a:redhat:migration_toolkit_virtualization:2.10::el9'], 'vendor': 'Red Hat', 'product': 'Migration Toolkit for Virtualization 2.1', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:migration_toolkit_virtualization:2.9::el9'], 'vendor': 'Red Hat', 'product': 'Migration Toolkit for Virtualization 2.9', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:quay:3.12::el8'], 'vendor': 'Red Hat', 'product': 'Red Hat Quay 3.12', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:quay:3.15::el8'], 'vendor': 'Red Hat', 'product': 'Red Hat Quay 3.15', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:quay:3.16::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat Quay 3.16', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:quay:3.10::el8'], 'vendor': 'Red Hat', 'product': 'Red Hat Quay 3.1', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:quay:3.9::el8'], 'vendor': 'Red Hat', 'product': 'Red Hat Quay 3.9', 'defaultStatus': 'affected'}] Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N Added CWE CWE-347 Added Reference https://access.redhat.com/errata/RHSA-2026:19375 Added Reference https://access.redhat.com/errata/RHSA-2026:19409 Added Reference https://access.redhat.com/errata/RHSA-2026:19410 Added Reference https://access.redhat.com/errata/RHSA-2026:6568 Added Reference https://access.redhat.com/errata/RHSA-2026:6720 Added Reference https://access.redhat.com/errata/RHSA-2026:6912 Added Reference https://access.redhat.com/errata/RHSA-2026:6926 Added Reference https://access.redhat.com/security/cve/CVE-2026-4600 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2450208 Added Reference https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4600.json -
CVE Modified by [email protected]
Jun. 26, 2026
Action Type Old Value New Value Added Reference https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-15812268 Changed Affected [{'vendor': 'n/a', 'product': 'jsrsasign', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '11.1.1', 'versionType': 'semver'}]}] [{'vendor': 'n/a', 'product': 'jsrsasign', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '11.1.1', 'versionType': 'semver'}]}, {'vendor': 'n/a', 'product': 'org.webjars.npm:jsrsasign', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '*', 'versionType': 'semver'}]}] -
CPE Deprecation Remap by [email protected]
Jun. 22, 2026
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:jsrsasign_project:jsrsasign:*:*:*:*:*:node.js:*:* versions from (excluding) 11.1.1 OR *cpe:2.3:a:kjur:jsrsasign:*:*:*:*:*:node.js:*:* versions from (excluding) 11.1.1 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-4600', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-03-23T14:32:39.569693Z'} -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'n/a', 'product': 'jsrsasign', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '11.1.1', 'versionType': 'semver'}]}] -
Data Remediation by [email protected]
Apr. 29, 2026
Action Type Old Value New Value Changed CVSS V4.0 Score 9.1 8.1 -
Initial Analysis by [email protected]
Mar. 23, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Added CPE Configuration OR *cpe:2.3:a:jsrsasign_project:jsrsasign:*:*:*:*:*:node.js:*:* versions up to (excluding) 11.1.1 Added Reference Type Snyk: https://gist.github.com/Kr0emer/bf15ddc097176e951659a24a8e9002a7 Types: Exploit, Mitigation, Third Party Advisory Added Reference Type Snyk: https://github.com/kjur/jsrsasign/commit/37b4c06b145c7bfd6bc2a6df5d0a12c56b15ef60 Types: Patch Added Reference Type Snyk: https://github.com/kjur/jsrsasign/pull/646 Types: Issue Tracking Added Reference Type Snyk: https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370940 Types: Third Party Advisory Added Reference Type CISA-ADP: https://gist.github.com/Kr0emer/bf15ddc097176e951659a24a8e9002a7 Types: Exploit, Mitigation, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Mar. 23, 2026
Action Type Old Value New Value Added CWE CWE-347 Added Reference https://gist.github.com/Kr0emer/bf15ddc097176e951659a24a8e9002a7 -
New CVE Received by [email protected]
Mar. 23, 2026
Action Type Old Value New Value Added Description Versions of the package jsrsasign before 11.1.1 are vulnerable to Improper Verification of Cryptographic Signature via the DSA domain-parameter validation in KJUR.crypto.DSA.setPublic (and the related DSA/X509 verification flow in src/dsa-2.0.js). An attacker can forge DSA signatures or X.509 certificates that X509.verifySignature() accepts by supplying malicious domain parameters such as g=1, y=1, and a fixed r=1, which make the verification equation true for any hash. Added CVSS V4.0 AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Added CWE CWE-347 Added Reference https://gist.github.com/Kr0emer/bf15ddc097176e951659a24a8e9002a7 Added Reference https://github.com/kjur/jsrsasign/commit/37b4c06b145c7bfd6bc2a6df5d0a12c56b15ef60 Added Reference https://github.com/kjur/jsrsasign/pull/646 Added Reference https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370940