Vulnerability in Weebzone Telegram-Stremio
CVE-2026-109426
Telegram-Stremio through 5.1.0 contains an insecure storage vulnerability that allows attackers with access to the MongoDB database, backups, or logs to recover the operator's authenticated Telegram session string, which is protected only by a keyless, reversible encoding transform rather than actual encryption. Attackers can round-trip the stored value through the repository's own decode_string function with no secret key to obtain a fully authenticated Telegram session, granting complete control of the operator's Telegram account even when two-step verification is enabled.
Published .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- gist.github.com/mansurmavlankulov/489554cad7b38e07b9651c217f00fffb (technical-description)
- www.vulncheck.com/advisories/telegram-stremio-insecure-session-storage-via-enco… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109426?
- CVE-2026-109426 is a high-severity vulnerability in Weebzone Telegram-Stremio, classified under Cleartext Storage of Sensitive Information. CVSS score: 7.5/10. Published 2026-10-12.
- How severe is CVE-2026-109426?
- High severity. CVSS v3 base score is 7.5 out of 10.