---
type: source
title: "Solana Foundation launches SIRN and STRIDE security programs in response to $270M Drift exploit — but durable nonce vulnerability remains unaddressed"
author: "CoinDesk"
url: https://www.coindesk.com/tech/2026/04/07/solana-foundation-unveils-security-overhaul-days-after-usd270-million-drift-exploit
date: 2026-04-07
domain: internet-finance
secondary_domains: []
format: article
status: processed
processed_by: rio
processed_date: 2026-04-08
priority: medium
tags: [solana, security, drift-protocol, durable-nonce, sirn, stride, defi-exploits, multisig]
extraction_model: "anthropic/claude-sonnet-4.5"
---

## Content

The Solana Foundation launched two security programs on April 7, 2026, in direct response to the $270M Drift Protocol exploit:

**SIRN (Solana Incident Response Network):** A membership-based network of security firms for real-time crisis response. Founding members include Asymmetric Research, OtterSec, Neodyme, Squads, and ZeroShadow. The Foundation maintains established contacts with bridges, exchanges, and stablecoin issuers to coordinate freezes and responses during active exploits.

**STRIDE:** A structured evaluation program for DeFi protocols. Protocols with >$10M TVL that pass evaluation receive ongoing operational security monitoring (Foundation-funded). Formal verification is funded for protocols with >$100M TVL.

**The Drift exploit mechanism (summary):** North Korean state-affiliated actors (six-month operation) compromised developer devices via malicious TestFlight + VSCode/Cursor IDE vulnerabilities, obtaining multisig private keys. They used Solana's **durable nonce** feature to create pre-signed transactions that — unlike standard blockhash-based transactions — do not expire. These pre-signatures remained valid for 8+ days, allowing the attackers to execute the drain at a time of their choosing after pre-staging the transactions. The Security Council migration had zero timelock, eliminating the detection window.

**Critical limitation noted in coverage:** "No smart contract audit or monitoring tool was designed to catch it." SIRN addresses response speed — how fast the ecosystem can coordinate a response after an exploit begins. STRIDE evaluates protocol correctness. Neither addresses the specific attack vector: indefinitely valid pre-signed transactions enabled by durable nonces in a multisig context. The architectural gap persists.

## Agent Notes

**Why this matters:** This closes the "does SIRN address the durable nonce vulnerability?" thread from Sessions 14-15. The answer is no. The Solana Foundation acknowledged the limitation honestly — SIRN and STRIDE are response and evaluation improvements, not prevention of the durable nonce attack surface. The underlying attack vector (pre-signed transactions with indefinite validity + zero-timelock governance) remains exploitable.

**What surprised me:** The $270M figure (the research agent cited this; Session 15 had cited $330M in early reporting) — the confirmed number being lower suggests either partial recovery or revised attribution. The scale still makes it the largest DeFi exploit of 2026 by any estimate.

**What I expected but didn't find:** Any mention of a Solana protocol-level fix for durable nonce behavior — for example, requiring time-bound nonces or adding a validity window. The Foundation responded at the coordination layer (SIRN) and the evaluation layer (STRIDE) without proposing an architectural change to the nonce mechanism itself. This absence is informative.

**KB connections:**
- The "trust-shifted not trust-eliminated" framing from Session 14 is directly supported: SIRN/STRIDE improve human coordination response (the trust layer that was attacked) but cannot eliminate the attack surface because the attack surface is human coordination itself.
- The blockchain coordination attractor state is programmable trust infrastructure... — the Drift case is the strongest evidence that the "programmable trust" framing requires qualification: the trust in coordinator identity remains, even if the trust in code execution is removed.

**Extraction hints:**
1. Claim: "Solana's durable nonce feature creates an indefinite pre-signed transaction validity window that standard multisig security models were not designed to handle, and the Solana Foundation's April 2026 SIRN/STRIDE response does not address this architectural gap"
2. Claim: "DeFi security incident response networks improve ecosystem coordination but cannot eliminate attack surfaces that exploit the human coordination layer rather than smart contract logic"

**Context:** SIRN/STRIDE are genuine improvements — a coordinated response network and formal verification funding are valuable. The limitation is about architectural prevention vs. response capability, not about the value of these programs.

## Curator Notes (structured handoff for extractor)

PRIMARY CONNECTION: The "trust-shifted not trust-eliminated" observation from Session 14 — this source closes the loop on whether the Solana response addresses the root cause.

WHY ARCHIVED: Provides the definitive answer to the "does SIRN address the durable nonce vulnerability?" thread. Important for scoping any claims about DeFi trustlessness and attack surface characterization.

EXTRACTION HINT: Focus on the architecture gap — SIRN/STRIDE are real improvements but do not prevent the specific attack vector. Any claim about DeFi security improvements should note the distinction between response capability and attack surface prevention. The absence of a durable nonce architectural fix is informative about what Solana Foundation believes is feasible vs. what it believes is an acceptable tradeoff.
