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HIGH severity

CVE-2018-8015 — orc

HIGHFix: apache/orc#266

CVE-2018-8015 is a high-severity (CVSS 7.5) CWE-674 vulnerability in org.apache.orc:orc. A fix is available for org.apache.orc:orc — see the affected versions and patch details below.

Apache ORC vulnerable to Uncontrolled Recursion

Also known asGHSA-mqmp-4mcp-vg8v
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 30, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
3.2%probability of exploitation in next 30 days
Lower Risk-0.06%
Lower risk than most CVEs88th percentile — riskier than 88% of all scored CVEsHighest risk
2.73%3.37%4.01%4.64%4.1%3.2%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
☕org.apache.orc:orc

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

In Apache ORC 1.0.0 to 1.4.3 a malformed ORC file can trigger an endlessly recursive function call in the C++ or Java parser. The impact of this bug is most likely denial-of-service against software that uses the ORC file parser. With the C++ parser, the stack overflow might possibly corrupt the stack.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.apache.orc:orc≥ 1.0.0&&< 1.4.41.4.4org.apache.orc:orc:1.4.4

Affected Products

1 product · 1 configurations
Application
orcapache
> 1.0.0 && ≤ 1.4.3
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.orc:orc, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.apache.orc:orc to 1.4.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2018-8015 is resolved across your whole dependency graph.

  3. Workarounds

    Stop feeding it untrusted input: reject or quarantine files and payloads from unverified sources until you can upgrade, restrict accepted formats to the ones you actually need, and run the parsing or decoding step in a least-privileged sandbox or short-lived worker so a crash or corrupted read cannot reach the rest of the process.

Frequently Asked Questions

In Apache ORC 1.0.0 to 1.4.3 a malformed ORC file can trigger an endlessly recursive function call in the C++ or Java parser. The impact of this bug is most likely denial-of-service against software that uses the ORC file parser. With the C++ parser, the stack overflow might possibly corrupt the stack.
O3 Security · Impact-Aware SCA

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CVE-2018-8015: orc — Fixed in 1.4.4