CVE-2024-34353

Backup private-key disclosure via debug logging

Published May 13, 2024 · Updated Aug 2, 2024

Sensitive-data exposure in Matrix.org matrix-sdk-crypto 0.7.0 allows local users to read a server-side backup private key from debug logs. During OlmMachine initialization, machine.rs re-parses the stored BackupDecryptionKey's Base64 private value as a MegolmV1BackupKey instead of deriving its public key. Exposure requires debug logging and access to the application logs; the bounded consequence is disclosure of the backup private key.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sensitive-data exposure in Matrix.org matrix-sdk-crypto 0.7.0 allows local users to read a server-side backup private key from debug logs. During OlmMachine initialization, machine.rs re-parses the stored BackupDecryptionKey's Base64 private value as a MegolmV1BackupKey instead of deriving its public key. Exposure requires debug logging and access to the application logs; the bounded consequence is disclosure of the backup private key.

The record

CVE
CVE-2024-34353
Published
May 13, 2024
Updated
Aug 2, 2024
Vendor
Matrix.org
Product
matrix-sdk-crypto
Classifications
CWE-532, T1552.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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== 0.7.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Matrix.org · matrix-sdk-cryptoversion== 0.7.0

Published CVSS scores

5.5GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-532Insertion of Sensitive Information into Log File
T1552.004Unsecured Credentials: Private Keys

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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