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RUSTSEC-2026-0144

HighCVSS 8.2 / 10
Published May 7, 2026·Last modified May 18, 2026
Affected Components(0)

No affected components available

Description

Affected versions of anchor-lang did not properly validate accounts declared as Program<'info, System>. The generic Program<T> validation path used Pubkey::default() as a sentinel to decide whether any executable program should be accepted. Since the system program id is also the default pubkey, Program<'info, System> was treated like the untyped Program<'info> case and accepted any executable program account.

Programs commonly rely on Program<'info, System> to ensure that CPI calls and instruction builders target the real Solana system program. With the faulty validation, an attacker could supply another executable program where the system program was expected, causing downstream logic to make false assumptions about payments, account creation, or other system-program CPIs.

The issue was fixed in anchor-lang 1.0.2 by separating the typed Program<T> validation path from the untyped Program<()> path, so Program<'info, System> now checks the provided account key against the system program id. Users should upgrade to anchor-lang 1.0.2 or later.

Risk Scores
Base Score
8.2

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a low impact on the confidentiality of the information. There is a high impact on the integrity of the data.

Threat Intelligence
7.5

Exploitation activity has been observed. Apply available patches or mitigations urgently.

EPSS
0.25%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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