CVE-2026-73155Network attack vector

Authenticated reaction tampering via missing visibility check

Published Aug 11, 2026 · Updated Aug 11, 2026

Missing authorization in CTI-Transmute 1.4.0 and earlier allows remote authenticated users to alter reactions on inaccessible comments. The react() handler sends an attacker-controlled comment_id to comments_repo.toggle_reaction() without checking comment visibility. Knowledge of an inaccessible comment ID and a valid account is sufficient to add or remove emoji reactions, altering reaction state without disclosing comment content.

CVSS severity5.3
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in CTI-Transmute 1.4.0 and earlier allows remote authenticated users to alter reactions on inaccessible comments. The react() handler sends an attacker-controlled comment_id to comments_repo.toggle_reaction() without checking comment visibility. Knowledge of an inaccessible comment ID and a valid account is sufficient to add or remove emoji reactions, altering reaction state without disclosing comment content.

The record

CVE
CVE-2026-73155
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
MISP Project
Product
CTI-Transmute
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 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 <=1.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MISP Project · CTI-Transmuteversion=0 <=1.4.0

Published CVSS scores

5.3CIRCLCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1565.001Stored Data Manipulation

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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