What is the CVSS score of CVE-2026-25087?

CVE-2026-25087 has a contested CVSS base score of 7.0 from a third party (e.g. CISA-ADP), while the vendor rates it High. vuln.today uses the vendor rating as authoritative.

How to fix or mitigate CVE-2026-25087?

Within 24 hours: Inventory all systems and applications using Apache Arrow C++ versions 15.0.0-23.0.0 and assess exposure in production environments. Within 7 days: Deploy available patches to all affected systems, prioritizing internet-facing and data-processing infrastructure. Within 30 days: Complete patching across all environments including development and testing systems, and validate functionality post-patch.

Arrow CVE-2026-25087

HIGH

Use After Free (CWE-416)

2026-02-17 security@apache.org

GHSA-rgxp-2hwp-jwgg

Denial Of Service Python Apache Use After Free Memory Corruption Ruby Red Hat Arrow Suse

High

Disputed · 7.0 NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Craft malicious Arrow IPC file
Delivery

Include variadic buffers in record batch
Exploit

Trigger pre-buffering during read
Execution

Write to dangling pointer
Impact

Cause memory corruption

Vulnerability Assessment

Weakness	CWE CWE-416 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Memory lifecycle management MITRE ATT&CK 2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	Apache Arrow C++ versions 15.0.0 through 23.0.0 with pre-buffering enabled, reading IPC files (not streams) containing Binary View or String View data with variadic buffers in record batch columns, requiring specific multi-threaded IO timing conditions.
Impact	CVSS 7.0 (HIGH). Attack vector: Network. Complexity: High. Privileges required: None. User interaction: None.
Exploit ScenarioDerived	An attacker could exploit this vulnerability to compromise the affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Use After Free vulnerability in Apache Arrow C++. This issue affects Apache Arrow C++ from 15.0.0 through 23.0.0. [CVSS 7.0 HIGH]

RemediationAI

A vendor patch is available — apply it immediately. Restrict network access to the affected service where possible.

Affected Packages

pypi pyarrow fix: 23.0.1

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in pypi

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Classified as CWE-416 (Use After Free). Affects Arrow. Use After Free vulnerability in Apache Arrow C++.

This issue affects Apache Arrow C++ from 15.0.0 through 23.0.0. It can be triggered when reading an Arrow IPC file (but not an IPC stream) with pre-buffering enabled, if the IPC file contains data with variadic buffers (such as Binary View and String View data). Depending on the number of variadic buffers in a record batch column and on the temporal sequence of multi-threaded IO, a write to a dangling pointer could occur. The value (a `std::shar

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Sources disagree (Low–High)

NVD PRIMARY 7.0 HIGH

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

SUSE 3.1 LOW

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

Red Hat 5.3 MEDIUM

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

High

Lifecycle Timeline

Patch released

Mar 11, 2026 - 15:20 nvd

Patch available

CVE Published

Feb 17, 2026 - 14:16 nvd

HIGH 7.0

DescriptionCVE.org

Use After Free vulnerability in Apache Arrow C++.

Pre-buffering is disabled by default but can be enabled using a specific C++ API call (RecordBatchFileReader::PreBufferMetadata). The functionality is not exposed in language bindings (Python, Ruby, C GLib), so these bindings are not vulnerable.

The most likely consequence of this issue would be random crashes or memory corruption when reading specific kinds of IPC files. If the application allows ingesting IPC files from untrusted sources, this could plausibly be exploited for denial of service. Inducing more targeted kinds of misbehavior (such as confidential data extraction from the running process) depends on memory allocation and multi-threaded IO temporal patterns that are unlikely to be easily controlled by an attacker.

Advice for users of Arrow C++:

check whether you enable pre-buffering on the IPC file reader (using RecordBatchFileReader::PreBufferMetadata)
if so, either disable pre-buffering (which may have adverse performance consequences), or switch to Arrow 23.0.1 which is not vulnerable

Executive ViewAI

Why It Matters

Apache Arrow C++ versions 15.0.0 through 23.0.0 contain a Use After Free vulnerability that could allow attackers to execute arbitrary code or cause denial of service on systems using affected versions. Organizations using Apache Arrow for data processing, analytics, or ETL pipelines should prioritize patching to prevent potential data breach or service disruption.

Business Impact: High

Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score

0.2%

Top 57% exploitable

Threat Intel

1 source

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS GHSA Vendor

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.2%

Patch available Yes

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +35

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Use After Free HIGH

Use-after-free vulnerabilities occur when a program continues to access memory through a pointer after that memory has been deallocated.

Memory Corruption HIGH

Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.