CVE-2026-55976Network attack vectorHinoki check available

Authenticated SSRF via unvalidated Avro schema URLs

Published Aug 25, 2026 · Updated Aug 26, 2026

Server-side request forgery in Apache Hive before 4.2.1 allows remote authenticated users to make Hive fetch attacker-selected URLs. AvroSerdeUtils resolves the avro.schema.url table property without restricting remote schemes or hosts, causing schema reads under the Hive process identity. Network access, valid authentication, and CREATE TABLE or equivalent DDL rights are required; successful requests can read cloud metadata, internal services, or local files visible to Hive.

CVSS severity9.1
Critical
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Server-side request forgery in Apache Hive before 4.2.1 allows remote authenticated users to make Hive fetch attacker-selected URLs. AvroSerdeUtils resolves the avro.schema.url table property without restricting remote schemes or hosts, causing schema reads under the Hive process identity. Network access, valid authentication, and CREATE TABLE or equivalent DDL rights are required; successful requests can read cloud metadata, internal services, or local files visible to Hive.

The record

CVE
CVE-2026-55976
Published
Aug 25, 2026
Updated
Aug 26, 2026
Vendor
The Apache Software Foundation
Product
Apache Hive
Classifications
CWE-918, T1552.005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.1.0 <=4.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache Hiveversion=2.1.0 <=4.2.0

Published CVSS scores

9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1552.005Unsecured Credentials: Cloud Instance Metadata API

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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