Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV L H P H N L H N 5.7 .0013 2.2 —
AFFECTED Product Versions Fixed Core ROM 2.1.0 – 2.1.2
TIMELINE Jun 9 Reserved by Caliptra Aug 4 Published (CNA: Caliptra) Sep 3 RESCORED — CVE-2026-11835 (Caliptra Core ROM). CVSS 5.6 → 5.7 (NVD).
Time-of-check time-of-use (TOCTOU) vulnerability combined with missing input validation in Caliptra Core ROM (UpdateResetFlow::run()) in subsystem mode allows a compromised local attacker to silently bypass secure boot by supplying an AXI staging address that is not validated against the strap-configured SS_EXTERNAL_STAGING_AREA_BASE_ADDR, enabling firmware to be modified between verification and loading into ICCM. Attestation continues to report the originally verified image digest, masking the compromise. Exploitation requires a compromised MCU firmware with AXI manager access to unprotected SRAM reachable by Caliptra. This issue affects Core ROM: 2.1.0 through 2.1.1.
| Date | Event | Detail |
|---|---|---|
| June 9, 2026 | Reserved | Reserved by Caliptra |
| August 4, 2026 | Published | Published (CNA: Caliptra) |
| September 3, 2026 | RESCORED | RESCORED — CVE-2026-11835 (Caliptra Core ROM). CVSS 5.6 → 5.7 (NVD). |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| Caliptra | Core ROM | — | 2.1.0 | 2.1.2 |
Authoritative record: CVE-2026-11835 at cve.org
Vendors: caliptra
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-11835 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
