🛡️ CVE-2026-66407

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: High — total loss, or loss the attacker controls.
• Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2026-66407 is classified as CWE-327: Use of a Broken or Risky Cryptographic Algorithm. An algorithm with known weaknesses is used, so the protection it appears to give does not hold.

Affected software

CVE-2026-66407 is recorded against 1 package.

• unknown

Timeline and source

Published on 10 August 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

jvn.jp
robot.hellohas.co.jp

Other advisories for this package

unknown has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2022-4995 (9.8 Critical, published 7 Aug 2026)
• CVE-2022-4994 (published 30 Jul 2026)
• CVE-2023-49900 (9.8 Critical, published 16 Jul 2026)
• CVE-2023-49899 (9.8 Critical, published 16 Jul 2026)
• CVE-2022-4990 (published 3 Jul 2026)
• CVE-2022-4989 (published 3 Jul 2026)
• CVE-2022-50973 (9.8 Critical, published 2 Jul 2026)
• CVE-2023-20572 (published 26 Jun 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-327: Use of a Broken or Risky Cryptographic Algorithm) in other software:

• CVE-2026-11481 (2.5 Low, published 18 Aug 2026)
• CVE-2026-8470 (7.4 High, published 5 Aug 2026)
• CVE-2026-56609 (4.8 Medium, published 3 Aug 2026)
• CVE-2026-67336 (8.7 High, published 1 Aug 2026)
• CVE-2026-10813 (3.6 Low, published 23 Jul 2026)
• CVE-2026-10766 (3.6 Low, published 23 Jul 2026)
• CVE-2026-10812 (3.6 Low, published 23 Jul 2026)
• CVE-2026-56582 (3.1 Low, published 21 Jul 2026)

Details

Affected Packages

References