CVE-2026-22866

Katalog CVE

CVSS 7.5 · High EPSS 0,18%

Kerentanan Improper Verification of Cryptographic Signature pada ens.domains ethereum name service. Skor CVSS 3.1 7.5 (High) menurut NVD.

Deskripsi (NVD)

Ethereum Name Service (ENS) is a distributed, open, and extensible naming system based on the Ethereum blockchain. In versions 1.6.2 and prior, the `RSASHA256Algorithm` and `RSASHA1Algorithm` contracts fail to validate PKCS#1 v1.5 padding structure when verifying RSA signatures. The contracts only check if the last 32 (or 20) bytes of the decrypted signature match the expected hash. This enables Bleichenbacher's 2006 signature forgery attack against DNS zones using RSA keys with low public exponents (e=3). Two ENS-supported TLDs (.cc and .name) use e=3 for their Key Signing Keys, allowing any domain under these TLDs to be fraudulently claimed on ENS without DNS ownership. Apatch was merged at commit c76c5ad0dc9de1c966443bd946fafc6351f87587. Possible workarounds include deploying the patched contracts and pointing DNSSECImpl.setAlgorithm to the deployed contract.

Rincian

Terbit di NVD

25 Februari 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

7.5 (High), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-347: Improper Verification of Cryptographic Signature

EPSS (30 hari)

0,18% peluang dieksploitasi; lebih tinggi dari 7,0% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/ensdomains/ens-contracts/security/advisories/GHSA-c6rr-7pmc-73wc patch · advisory vendor
• https://github.com/ensdomains/ens-contracts-bug-62248-pr-509 patch · release notes
• https://github.com/ensdomains/ens-contracts/commit/c76c5ad0dc9de1c966443bd946fafc6351f87587 patch