CVE-2026-110259: medium-severity vulnerability in OW2 ASM
OW2 ASM 3.0 before 9.11 Uncontrolled Recursion via ClassWriter.replaceAsmInstructions()
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.8epss 0.2%
OW2 ASM 3.0 before 9.11 contains an uncontrolled recursion vulnerability in ClassWriter.replaceAsmInstructions() that allows attackers to cause denial of service through crafted class files. Attackers can supply a class with a large method containing many long forward jumps, triggering unbounded toByteArray() recursion and a StackOverflowError during transformation.
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
Affected products
OW2 · ASMRelated CVEs — OW2 ASM
In the same product, most dangerous first.
CVE-2026-110591MEDIUMOW2 ASM 1.4.3 before 9.11 Excessive Resource Consumption via AnalyzerEPSS 0.2%CVE-2026-110260MEDIUMOW2 ASM 3.0 before 9.11 Quadratic Memory Allocation via Exception HandlersEPSS 0.2%CVE-2026-110270MEDIUMOW2 ASM 3.0 before 9.11 Exponential Memory Allocation in JSRInlinerAdapterEPSS 0.2%CVE-2026-110263MEDIUMOW2 ASM 3.0 before 9.11 Uncontrolled Recursion in SignatureReaderEPSS 0.2%CVE-2026-110261MEDIUMOW2 ASM 3.0 before 9.11 Excessive CPU Consumption via ClassWriter COMPUTE_FRAMESEPSS 0.2%CVE-2026-110258MEDIUMOW2 ASM 3.0 before 9.11 Excessive Memory Allocation via Multiple RET InstructionsEPSS 0.2%
References
https://asm.ow2.io/versions.htmlhttps://gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm/src/main/java/org/objectweb/asm/ClassWriter.java#L751https://gitlab.ow2.org/asm/asm/-/commit/e9aca627c17e1619bcb8059afb43382dac6b275fhttps://gitlab.ow2.org/asm/asm/-/merge_requests/459https://www.vulncheck.com/advisories/ow2-asm-3.0-before-9.11-uncontrolled-recursion-via-classwriter-replaceasminstructions