# CVE-2026-111959: Apache Arrow Rust: Improper validation of RunEndEncoded arrays allows out of bounds reads

Status: published. Published: 2026-11-02. Updated: 2026-11-02.

Out-of-bounds read vulnerability in Apache Arrow Rust (`arrow` crate), from version 33.0.0 through to versions 57.3.1, 58.4.0, 59.3.1 and 60.0.0.



Improper validation of RunEndEncoded arrays in the ArrayData interface can allow reading data beyond the bounds of the child values array.



Users are recommended to upgrade to versions 60.1.0, 59.3.2, 58.4.1, 57.3.2 which fixes the issue.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Apache Software Foundation / Apache Arrow Rust (arrow): ≥ 60.0.0; < 60.1.0 (affected, semver); ≥ 59.0.0; ≤ 59.3.1 (affected, semver); ≥ 58.0.0; ≤ 58.4.0 (affected, semver); ≥ 33.0.0; ≤ 57.3.1 (affected, semver). Source: CNA: apache

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-125, CWE-20

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://lists.apache.org/thread.html/hnlrdk4w99b188w1zgjlctpwpg7y55o4 (CNA: apache; vendor-advisory)

## Provenance

- CNA: apache: https://www.cve.org/CVERecord?id=CVE-2026-111959; retrieved 2026-11-02; source updated 2026-11-02

Revision: c878bd1ee70e18337dd2266da8b0359617986a6d8241e5b0f035c4e587b57592

Canonical: https://y2.dev/cve/CVE-2026-111959

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