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PatchSiren cyber security CVE debrief

CVE-2026-110591 OW2 CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-10-14T14:16:36.219Z and has not been modified since then. Defenders should prioritize verifying exposure in systems using OW2 ASM 1.4.3 before 9.11 and assess the impact of potential denial-of-service attacks. The vulnerability in Analyzer.analyze() allows attackers to exhaust memory and CPU via crafted class files. The debrief provides an executive overview of the affected product, vulnerability class, and likely operational impact.

Vendor
OW2
Product
ASM
CVSS
MEDIUM 6.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-14
Original CVE updated
2026-10-14
Advisory published
2026-10-14
Advisory updated
2026-10-14

Who should care

Defenders responsible for systems using OW2 ASM 1.4.3 before 9.11 should assess exposure and prioritize verification and potential updates. This includes operators, platform administrators, vulnerability management teams, and security teams who need to review the vulnerability's impact and implement necessary mitigations.

Why it matters

Defenders should prioritize verifying exposure in systems using OW2 ASM 1.4.3 before 9.11 and assess the impact of potential denial-of-service attacks.

  • Denial-of-service attacks via crafted class files
  • Potential exhaustion of memory and CPU resources
  • Need for verification of exposure in systems using OW2 ASM 1.4.3 before 9.11
  • Priority for updating to OW2 ASM 9.11 or later

Technical summary

OW2 ASM 1.4.3 before 9.11 contains an excessive resource consumption vulnerability in Analyzer.analyze() that allows attackers to exhaust memory and CPU via crafted class files. The vulnerability is triggered through BasicVerifier, SimpleVerifier, or SourceInterpreter, leading to unbounded per-instruction Frame allocation and fix point iterations, causing denial of service. Defenders should prioritize verifying exposure in systems using OW2 ASM 1.4.3 before 9.11 and assess the impact of potential denial-of-service attacks.

Defensive priority

Defenders should prioritize verifying exposure in systems using OW2 ASM 1.4.3 before 9.11 and assess the impact of potential denial-of-service attacks.

Recommended defensive actions

  • Verify exposure in systems using OW2 ASM 1.4.3 before 9.11
  • Assess the impact of potential denial-of-service attacks
  • Update to OW2 ASM 9.11 or later if possible
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the excessive resource consumption vulnerability in OW2 ASM 1.4.3 before 9.11. However, the corpus does not establish versions beyond 1.4.3 and 9.11, exploitation, impact, or remediation for all affected systems, requiring verification from the supplied official sources. Additional details may be found in official CVE Program records and NIST NVD vulnerability assessments.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-110591 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-110591

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-110591 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-110591

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • OW2 ASM 1.4.3 before 9.11 Excessive Resource Consumption via Analyzer

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/110xxx/CVE-2026-110591.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://gitlab.ow2.org/asm/asm/-/merge_requests/468

    Supplemental source - patch

  • Source reference

    Unverified legacy reference

    URL: https://gitlab.ow2.org/asm/asm/-/commit/4632a2283f1192fd0e93035661b49568a7cb8b6c

    Supplemental source - patch

  • Source reference

    Unverified legacy reference

    URL: https://gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm-analysis/src/main/java/org/objectweb/asm/tree/analysis/Analyzer.java

    Supplemental source - technical-description

  • Source reference

    Unverified legacy reference

    URL: https://asm.ow2.io/versions.html

    Supplemental source - release-notes

  • Source reference

    Unverified legacy reference

    URL: https://www.vulncheck.com/advisories/ow2-asm-1.4.3-before-9.11-excessive-resource-consumption-via-analyzer

    Supplemental source - third-party-advisory

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.