CVE-2026-61672Public exploitNetwork attack vector

Tenant isolation bypass via mismatched sort order

Published Sep 18, 2026 · Updated Sep 18, 2026

Incorrect authorization in Project Capsule Capsule before 0.13.7 allows remote authenticated users to bypass forbidden metadata restrictions. ForbiddenListSpec.ExactMatch sorts denied keys case-insensitively but searches them in byte order, causing api.ValidateForbidden to miss present keys. Exploitation requires tenant-owner rights and a forbidden list whose case-insensitive and byte orderings differ; consequences depend on the missed key.

CVSS severity7.1
High
EPSS probability0.33%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Project Capsule Capsule before 0.13.7 allows remote authenticated users to bypass forbidden metadata restrictions. ForbiddenListSpec.ExactMatch sorts denied keys case-insensitively but searches them in byte order, causing api.ValidateForbidden to miss present keys. Exploitation requires tenant-owner rights and a forbidden list whose case-insensitive and byte orderings differ; consequences depend on the missed key.

The record

CVE
CVE-2026-61672
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
Project Capsule
Product
Capsule
Classifications
CWE-697, CWE-863, T1562
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=< 0.13.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Project Capsule · Capsuleversion=< 0.13.7

Published CVSS scores

7.1GitHubCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-697Incorrect Comparison
CWE-863Incorrect Authorization
T1562Impair Defenses

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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