Is there a public exploit for CVE-2026-110747?

No public exploit for CVE-2026-110747 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-110747?

CVE-2026-110747 scores CVSS 7.5 (v3.1), rated high.

7.5 High

ProtobufParser.readStringKey() reads the length prefix of a protobuf map entry's string key into an attacker-controlled int and then checks…

CVE-2026-110747

ProtobufParser.readStringKey() reads the length prefix of a protobuf map entry's string key into an attacker-controlled int and then checks (inputPtr + len) <= inputEnd using signed arithmetic. For values near Integer.MAXVALUE the addition overflows to a negative value and the check passes even when the input contains no key data. The parser then calls finishShortText(len), which expands the text buffer to the declared length via TextBuffer.expandCurrentSegment and Arrays.copyOf, throwing OutOfMemoryError: Requested array size exceeds VM limit. An 8-byte malformed message containing a map entry with a declared key length of 0x7FFFFFFF is sufficient. Configured StreamReadConstraints, including maxStringLength, maxNameLength, maxDocumentLength and maxNestingDepth, do not prevent the failure. Applications running with -XX:+ExitOnOutOfMemoryError terminate the JVM. This is the same integer-overflow pattern addressed for other call sites in the remediation associated with CVE-2026-104016 and CVE-2026-104017; the map-key call site was corrected on the 3.x branches only, leaving the corresponding 2.x branches unguarded. Release lines 2.18, 2.19 and 2.20 do not contain readStringKey() and…

Assessment

CVSS: 7.5 (v3.1)
Severity: High
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 28 October 2026
Last updated: 28 October 2026
Weakness: CWE-190
Assigner: 36c7be3b-2937-45df-85ea-ca7133ea542c

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

At the source

References

https://github.com/FasterXML/jackson-dataformats-binary/security/advisories/GHSA-fv7v-rrmh-4qcv

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