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CVE-2026-123816 – pyLoad: Authentication bypass in API key validation (check_apikey cache)

Posted on November 10, 2026
CVE ID :CVE-2026-123816

Published : Nov. 9, 2026, 9:15 p.m. | 1 hour, 59 minutes ago

Description :pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev101, Api.check_apikey caches successful validation in self._apikey_cache using only the attacker-controlled key_id. After a legitimate key populates the cache, a forged API key with the same key_id reaches the cache-hit path without comparing apikey[-43:] to the stored hash through hmac.compare_digest. Key identifiers are small sequential integers, so an unauthenticated remote attacker can enumerate an active identifier and inherit the cached key owner’s permissions during the 300-second cache lifetime. This issue is fixed in version 0.5.0b3.dev101.

Severity: 8.1 | HIGH

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