CVE-2026-68981Network attack vectorHinoki check available

Service interruption via gzip request decompression

Published Aug 3, 2026 · Updated Aug 3, 2026

Resource exhaustion in Apache NiFi 1.5.0 through 2.10.0 allows remote attackers to exhaust memory via gzip-encoded REST requests. The Jersey encoding filter applies the configured request-size limit to compressed bytes, then expands attacker-controlled gzip content without an output-size bound. No authentication or user interaction is required; exhausting heap memory interrupts the NiFi service.

CVSS severity8.8
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Resource exhaustion in Apache NiFi 1.5.0 through 2.10.0 allows remote attackers to exhaust memory via gzip-encoded REST requests. The Jersey encoding filter applies the configured request-size limit to compressed bytes, then expands attacker-controlled gzip content without an output-size bound. No authentication or user interaction is required; exhausting heap memory interrupts the NiFi service.

The record

CVE
CVE-2026-68981
Published
Aug 3, 2026
Updated
Aug 3, 2026
Vendor
The Apache Software Foundation
Product
Apache NiFi
Classifications
CWE-409, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=1.5.0 <=2.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache NiFiversion=1.5.0 <=2.10.0

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.8Apache Software FoundationCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA: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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-409Improper Handling of Highly Compressed Data (Data Amplification)
T1499.004Application or System Exploitation

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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