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0xCERT Security Advisory 0xCERT-2026-0324
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Advisory-ID:  0xCERT-2026-0324
Severity:     Medium
Published:    2026-11-05T00:00:00.000Z
Updated:      2026-11-08T07:23:32.550Z
Chains:       BNB Chain
URL:          https://www.0xcert.com/advisory/0xCERT-2026-0324

Title: TENDRIL Sell-Hook Reserve Drain

Summary
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A flaw in the TENDRIL token's custom sell hook let an attacker desync its PancakeSwap V2 reserves with a controlled burn and drain roughly $555,000 in USDT on BNB Chain.

Details
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Summary
A flaw in the TENDRIL token's custom sell hook let an attacker desync its PancakeSwap V2 reserves with a controlled burn and drain roughly $555,000 in USDT on BNB Chain.

Incident
- - Victim: TENDRIL
- - Date (UTC): 2026-11-05
- - Estimated loss: $555k
- - Chain(s): BNB Chain
- - Attack type: smart-contract exploit
- - Funds status: stolen

Recommended actions
- - Revoke token approvals granted to TENDRIL contracts until the project confirms they are safe
- - Integrators: pause or delist affected assets and monitor for attacker fund movements
- - Beware of follow-on phishing: ignore unofficial "refund", "recovery", or "claim" links and DMs; use the project's verified channels only

Source & attribution
Full analysis on Blockchain Breaches, 0xCERT's incident archive: https://www.blockchainbreaches.com/en/breaches/tendril-2026. Primary sources: https://cryptobriefing.com/tendril-exploit-555k-usdt-loss-bnb-chain/ ; https://phemex.com/news/article/tendril-sell-mechanism-flaw-leads-to-555k-in-losses-102479.

References
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- - https://www.blockchainbreaches.com/en/breaches/tendril-2026
- - https://cryptobriefing.com/tendril-exploit-555k-usdt-loss-bnb-chain/
- - https://phemex.com/news/article/tendril-sell-mechanism-flaw-leads-to-555k-in-losses-102479

Verify with the 0xCERT OpenPGP key: https://www.0xcert.com/pgp.asc
Fingerprint: 5F94 3ED1 1E50 CF31 2128  C493 CCC7 D9EC 9415 723D

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