GitHub Advisoryadvisory · crates.io
GHSA-429q-fhh4-r6hj Anchor: `InterfaceAccount` allows account substitution between unexpected types
HIGH
Official page ↗
- Ecosystem
- crates.io
- Packages
- anchor-lang
- Severity
- High
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
- Weaknesses
- CWE-20
- Reviewed
- 2026-05-13
Affected packages
• crates.io anchor-lang: >= 1.0.0-rc.1, < 1.0.0-rc.2 → fixed in 1.0.0-rc.2
Description
Impact
Any uses of `InterfaceAccount` allows another unexpected account type to be passed, after https://github.com/solana-foundation/anchor/pull/3837 disabled discriminator checking for this type.
The bug was originally reported and fixed in https://github.com/solana-foundation/anchor/pull/4139, see that PR for more details.
Patches
https://github.com/solana-foundation/anchor/pull/4139 patched the issue and was released in `1.0.0-rc.2`. Users should upgrade to the latest released version of Anchor 1.0.
References
Bug landed in: https://github.com/solana-foundation/anchor/pull/3837
Bug fixed in: https://github.com/solana-foundation/anchor/pull/4139
Related
Weakness · CWE (1)
- CWE-20 Improper Input Validation weakness
References
- https://github.com/otter-sec/anchor/security/advisories/GHSA-429q-fhh4-r6hj web
- https://github.com/solana-foundation/anchor/security/advisories/GHSA-429q-fhh4-r6hj web
- https://github.com/solana-foundation/anchor/pull/3837 web
- https://github.com/solana-foundation/anchor/pull/4139 web
- https://github.com/solana-foundation/anchor/commit/26ef36968a62e28a1f028e7adae4806af30c747d web
- https://github.com/solana-foundation/anchor package
- https://rustsec.org/advisories/RUSTSEC-2026-0146.html web