CVE-2026-77357Network attack vectorHinoki check available

Service interruption via unbounded hot-reload counter loop

Published Aug 25, 2026 · Updated Aug 25, 2026

Uncontrolled resource consumption in Mesop before 1.3.3 allows remote attackers to interrupt service through its debug hot-reload endpoint. The GET /hot-reload handler uses a user-supplied counter to drive an unbounded loop, holding worker threads until the pool is exhausted. Debug mode must expose the endpoint; repeated unauthenticated network requests make the server unresponsive until it is manually restarted.

CVSS severity8.7
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Uncontrolled resource consumption in Mesop before 1.3.3 allows remote attackers to interrupt service through its debug hot-reload endpoint. The GET /hot-reload handler uses a user-supplied counter to drive an unbounded loop, holding worker threads until the pool is exhausted. Debug mode must expose the endpoint; repeated unauthenticated network requests make the server unresponsive until it is manually restarted.

The record

CVE
CVE-2026-77357
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
mesop-dev
Product
Mesop
Classifications
CWE-834, CWE-400, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 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?

mesop-dev · Mesopversion=< 1.3.3

Published CVSS scores

8.7GitHub CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-834Excessive Iteration
CWE-400Uncontrolled Resource Consumption
T1499.003Application Exhaustion Flood

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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