CVE-2023-26818Public exploit

TCC bypass via unhardened dynamic-library injection

Published May 19, 2023 · Updated Jul 9, 2026

Incorrect authorization in Telegram 9.3.1 and 9.4.0 for macOS allows local users to read protected files and record audio or video. Telegram's executable lacks the Hardened Runtime flag, so DYLD_INSERT_LIBRARIES loads attacker-supplied code into a process carrying Telegram's existing privacy permissions. Exploitation requires local code execution and a LaunchAgent to avoid Terminal's sandbox; successful injection accesses protected resources without a new consent prompt.

CVSS severity5.5
Medium
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Telegram 9.3.1 and 9.4.0 for macOS allows local users to read protected files and record audio or video. Telegram's executable lacks the Hardened Runtime flag, so DYLD_INSERT_LIBRARIES loads attacker-supplied code into a process carrying Telegram's existing privacy permissions. Exploitation requires local code execution and a LaunchAgent to avoid Terminal's sandbox; successful injection accesses protected resources without a new consent prompt.

The record

CVE
CVE-2023-26818
Published
May 19, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-863, T1574.006
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.5CISA-ADPCVSS: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.

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

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 exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1574.006Dynamic Linker Hijacking

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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