CVE-2026-49956Public exploitNetwork attack vectorHinoki check available

Authenticated session-data disclosure via unscoped search

Published Jun 9, 2026 · Updated Jun 9, 2026

Missing authorization in Hermes WebUI before 0.51.269 allows remote authenticated users to read other profiles' session data. The _handle_sessions_search handler passes all_sessions() directly into title and transcript-content searches without filtering rows through _profiles_match() for the active profile. Any authenticated profile can retrieve other profiles' session titles and transcript messages; no write or service-interruption impact is reported.

CVSS severity7.1
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authorization in Hermes WebUI before 0.51.269 allows remote authenticated users to read other profiles' session data. The _handle_sessions_search handler passes all_sessions() directly into title and transcript-content searches without filtering rows through _profiles_match() for the active profile. Any authenticated profile can retrieve other profiles' session titles and transcript messages; no write or service-interruption impact is reported.

The record

CVE
CVE-2026-49956
Published
Jun 9, 2026
Updated
Jun 9, 2026
Vendor
Nathan Esquenazi
Product
Hermes WebUI
Classifications
CWE-862, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 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 <0.51.269

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nathan Esquenazi · Hermes WebUIversion=0 <0.51.269

Published CVSS scores

6.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
7.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1213Data from Information Repositories

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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