CVE-2026-87119Network attack vectorHinoki check available

Repeated payer charges via challenge-unbound activation credentials

Published Sep 22, 2026 · Updated Sep 22, 2026

Authentication bypass in ZenHive MPP 0.14.0 through 0.16.1 allows remote attackers to repeatedly charge a payer using a captured credential. MPP.Methods.Tempo.KeyAuthorization.verify/3 checks subscription fields but not the issuing challenge, while activate/4 deduplicates only by challenge ID. Access to a signed activation credential is required; replay under fresh challenges repeats first-period settlement until subscription expiry.

CVSS severity5.9
Medium
EPSS probability0.57%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authentication bypass in ZenHive MPP 0.14.0 through 0.16.1 allows remote attackers to repeatedly charge a payer using a captured credential. MPP.Methods.Tempo.KeyAuthorization.verify/3 checks subscription fields but not the issuing challenge, while activate/4 deduplicates only by challenge ID. Access to a signed activation credential is required; replay under fresh challenges repeats first-period settlement until subscription expiry.

The record

CVE
CVE-2026-87119
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
ZenHive
Product
MPP
Classifications
T1550
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 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=0.14.0 <0.16.2
  2. Affected versionversion=db464dfa9a86ccda58f0827101f6da6bd8aafa78 <4b6eaec02af0e8485cfb4ff68f467d075ed5dd6f

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ZenHive · MPPversion=0.14.0 <0.16.2; version=db464dfa9a86ccda58f0827101f6da6bd8aafa78 <4b6eaec02af0e8485cfb4ff68f467d075ed5dd6f

Published CVSS scores

5.9ZenHiveCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1550Use Alternate Authentication Material

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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