CVE-2026-111612: netdisk-fast-download through 0.4.8 Credential Disclosure via /v2/randomAuth

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-16 · updated 2026-10-16
Weakness: CWE-321

Description

netdisk-fast-download through 0.4.8 contains an information disclosure vulnerability that allows unauthenticated attackers to retrieve donated netdisk credentials via the /v2/randomAuth endpoint in ParserApi. Attackers can repeatedly call the endpoint and decrypt the encryptedAuth blob using the hard-coded AES key nfd_auth_key2026 to recover other users' cloud-drive cookies, tokens, or passwords.

Affected products

qaiu netdisk-fast-download: through 0.4.8

References

https://github.com/qaiu/netdisk-fast-download
https://github.com/qaiu/netdisk-fast-download/blob/v0.4.8/web-service/src/main/java/cn/qaiu/lz/common/util/AuthParamCodec.java#L31
https://github.com/qaiu/netdisk-fast-download/blob/v0.4.8/web-service/src/main/java/cn/qaiu/lz/web/controller/ParserApi.java#L738-L752
https://hackmd.io/@hieuPenguinnn/netdisk-fast-download-randomauth-donated-credential-disclosure
https://www.vulncheck.com/advisories/netdisk-fast-download-through-0.4.8-credential-disclosure-via-v2-randomauth
https://hackmd.io/@hieuPenguinnn/netdisk-fast-download-randomauth-donated-credential-disclosure

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