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StableLib Ed25519 Signature Malleability via Missing S < L Check

🗓️ 01 Apr 2026 22:13:35Reported by GitHub Advisory DatabaseType 
github
 github🔗 github.com👁 3 Views

StableLib Ed25519 verify omits S < L check, enabling signature malleability.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: IBM App Connect Enterprise Certified Container operator and operands are vulnerable to arbitrary code execution, loss of confidentiality and denial of service
6 May 202613:05
–ibm
IBM Security Bulletins		Security Bulletin: IBM Maximo Application Suite - Visual Inspection component uses node-forge-1.3.2.tgz, node-forge-1.3.3.tgz which is vulnerable to CVE-2026-33891, CVE-2026-33894, CVE-2026-33895, CVE-2026-33896
5 May 202612:43
–ibm
IBM Security Bulletins		Security Bulletin: Due to use of node-forge-1.3.1.tgz, IBM Sterling Connect:Direct Web Services is affected by Denial of Service (DoS).
2 Jun 202612:04
–ibm
ATTACKERKB		CVE-2026-33895
27 Mar 202620:47
–attackerkb
Chainguard		CVE-2026-33895 vulnerabilities
31 Mar 202619:17
–cgr
Circl		CVE-2026-33895
26 Mar 202622:04
–circl
CNNVD		Digital Bazaar Forge 数据伪造问题漏洞
27 Mar 202600:00
–cnnvd
CVE		CVE-2026-33895
27 Mar 202620:47
–cve
Cvelist		CVE-2026-33895 Forge has signature forgery in Ed25519 due to missing S > L check
27 Mar 202620:47
–cvelist
Github Security Blog		Forge has signature forgery in Ed25519 due to missing S > L check
26 Mar 202622:04
–github
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Vulners
Node
stablelibed25519Range≤2.0.2npm

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07 Apr 2026 14:23Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.17.5
EPSS0.00042
SSVC
CWE-347
ed25519signature malleabilitygroup order check
3