Auth bypass in Telegram

CVE-2023-26818

Telegram 9.3.1 and 9.4.0 allows attackers to access restricted files, microphone ,or video recording via the DYLD_INSERT_LIBRARIES flag.

Vulnerability class: Broken Access Control

EPSS: 0.005 (41.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Telegram — versions 9.3.1, 9.4
N/a — versions n/a

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

Public proof-of-concept exploits

References

af854a3a-2127-422b-91ae-364da2661108 (Product)
cve@mitre.org (Technical Description, Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-26818?: CVE-2023-26818 is a medium-severity vulnerability in Telegram, classified under Incorrect Authorization. CVSS score: 5.5/10. Published 2023-05-19.
How severe is CVE-2023-26818?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2023-26818 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.