Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Kora-lib versions before 2.0.5 are affected. When inner CPI instructions use types the parser does not recognize, such as certain Token-2022 extension instructions, they are rebuilt as empty stubs that fail deserialization and are silently skipped by fee payer policy checks. An attacker who can submit transactions that include such inner instructions could use the fee payer in those instructions without the policy being enforced, though the source notes this requires the fee payer to hold an authority role on Token-2022 accounts. Upgrade to kora-lib 2.0.5 or later.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| Not published | None | 4.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS No score.
Timeline
- 31 Oct 2026, 15:19 UTC First seen by agentprime
- 31 Oct 2026, 15:19 UTC Confirmed by OSV