CVE-2026-55588Public exploitNetwork attack vectorHinoki check available

Client operation hang via cyclic referrer traversal

Published Aug 25, 2026 · Updated Aug 27, 2026

Denial of service in ORAS CLI before 1.3.3 allows remote attackers to hang client operations via cyclic OCI referrer metadata. The fetchAllReferrers and RecursiveFindReferrers traversals recurse into returned descriptors without recording visited digests, causing unbounded CPU and memory growth on cycles. Exploitation requires a user or automation to query a malicious registry; discover uses unlimited recursion by default, while backup and restore also invoke affected counting logic.

CVSS severity6.5
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Denial of service in ORAS CLI before 1.3.3 allows remote attackers to hang client operations via cyclic OCI referrer metadata. The fetchAllReferrers and RecursiveFindReferrers traversals recurse into returned descriptors without recording visited digests, causing unbounded CPU and memory growth on cycles. Exploitation requires a user or automation to query a malicious registry; discover uses unlimited recursion by default, while backup and restore also invoke affected counting logic.

The record

CVE
CVE-2026-55588
Published
Aug 25, 2026
Updated
Aug 27, 2026
Vendor
ORAS Project
Product
ORAS CLI
Classifications
CWE-835, CWE-400, CWE-674, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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=< 1.3.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ORAS Project · ORAS CLIversion=< 1.3.3

Published CVSS scores

6.5GitHub CNACVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
CWE-400Uncontrolled Resource Consumption
CWE-674Uncontrolled Recursion
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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