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Fencer Vulns
medium 5.5

CVE-2026-110263 json

OW2 ASM 3.0 before 9.11 Uncontrolled Recursion in SignatureReader

published 2026-10-14 25 d ago modified 2026-10-14 25 d ago also EUVD-2026-101217

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 6%
public exploits
0
none known

Summary

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.

Patch / fix

  • OW2 ASM 9.11
  • asm Debian 14 9.11.1-1

debian advisories DEBIAN-CVE-2026-110263

  • maven3.9 hummingbird 1 3.9.16-0.4.hum1
  • maven3.9-lib hummingbird 1 3.9.16-0.4.hum1

red hat advisories RHSA-2026:83847

  • objectweb-asm Azure Linux 3.0 9.11.1-1

azure linux advisories AZL-108417

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-110263 updated cvss 5.5

org.ow2.asm/asm: OW2 ASM: Denial of Service via uncontrolled recursion in SignatureReader

  • Red Hat build of Quarkus asm 9.9.1.redhat-00001
    affected: no fix available
  • Red Hat Hardened Images maven3.9 3.9.16-0.4.hum1, maven3.9-lib 3.9.16-0.4.hum1
    fixed: vendor fix RHSA-2026:83847

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
25 d ago

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 6.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CNA 4.0 6.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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

Affected products

  • OW2 ASM

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.