What’s Vulnerable › Vulnerabilities

CVE-2026-110263: OW2 ASM 3.0 before 9.11 Uncontrolled Recursion in SignatureReader

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-14 · updated 2026-10-14
• Weakness: CWE-674

Description

OW2 ASM 3.0 before 9.11 contains an uncontrolled recursion vulnerability in SignatureReader.parseType() that allows attackers to exhaust the stack via deeply nested generic type signatures. Attackers can supply a crafted class file with a long Signature attribute containing many nested type arguments to trigger a StackOverflowError during class transformation, causing denial of service.

Affected products

• OW2 ASM: from 3.0 before 9.11 — fixed in 9.11

How to fix

Upgrade to a fixed version: OW2 ASM 9.11. Check the vendor advisory for mitigations.

References

• https://asm.ow2.io/versions.html
• https://gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm/src/main/java/org/objectweb/asm/signature/SignatureReader.java#L151
• https://gitlab.ow2.org/asm/asm/-/commit/8f87fc0317a4c5ee8f538bcbb641928def25dbd6
• https://gitlab.ow2.org/asm/asm/-/merge_requests/465
• https://www.vulncheck.com/advisories/ow2-asm-3.0-before-9.11-uncontrolled-recursion-in-signaturereader

Get alerted when CVE-2026-110263 or the next vulnerability affects your stack