# CVE-2024-23680: AWS Encryption SDK for Java Improper Verification of Cryptographic Signature

Status: published. Published: 2024-01-19. Updated: 2026-11-08.

AWS Encryption SDK for Java versions 2.0.0 to 2.2.0 and less than 1.9.0 incorrectly validates some invalid ECDSA signatures.

## Remediation

- fix: com.amazonaws:aws-encryption-sdk-java (Maven): OSV reports a fixed version 1.9.0. Check the advisory for supported release branches. (source: OSV GHSA-55xh-53m6-936r) — https://github.com/advisories/GHSA-55xh-53m6-936r
- fix: com.amazonaws:aws-encryption-sdk-java (Maven): OSV reports a fixed version 2.2.0. Check the advisory for supported release branches. (source: OSV GHSA-55xh-53m6-936r) — https://github.com/advisories/GHSA-55xh-53m6-936r

## Affected products and versions

-  /  (com.amazonaws:aws-encryption-sdk-java): ≥ 2.0.0; < 2.2.0 (affected, maven); ≥ 0; < 1.9.0 (affected, maven). Source: CNA: VulnCheck
-  / com.amazonaws:aws-encryption-sdk-java (com.amazonaws:aws-encryption-sdk-java): 0.0.1 (affected, Maven); 1.3.0 (affected, Maven); 1.3.1 (affected, Maven); 1.3.1-STAGING (affected, Maven); 1.3.2 (affected, Maven); 1.3.3 (affected, Maven); 1.3.4 (affected, Maven); 1.3.5 (affected, Maven); 1.3.6 (affected, Maven); 1.4.0 (affected, Maven); 1.4.1 (affected, Maven); 1.5.0 (affected, Maven); 1.6.0 (affected, Maven); 1.6.1 (affected, Maven); 1.6.2 (affected, Maven); 1.7.0 (affected, Maven); Ecosystem version events: introduced 0; fixed 1.9.0. Source: OSV GHSA-55xh-53m6-936r
-  / com.amazonaws:aws-encryption-sdk-java (com.amazonaws:aws-encryption-sdk-java): 2.0.0 (affected, Maven); Ecosystem version events: introduced 2.0.0; fixed 2.2.0. Source: OSV GHSA-55xh-53m6-936r

## Severity and prioritization

- CVSS 3.1: 5.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N; source: ADP: CISA-ADP

- CISA KEV: No listing in collected sources

- EPSS: 0.21% as of 2026-11-08; percentile 11.32%

- SSVC: exploitation none; automatable yes; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-347

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/aws/aws-encryption-sdk-java/security/advisories/GHSA-55xh-53m6-936r (CNA: VulnCheck; vendor-advisory)

- https://github.com/advisories/GHSA-55xh-53m6-936r (CNA: VulnCheck; vendor-advisory)

- https://vulncheck.com/advisories/vc-advisory-GHSA-55xh-53m6-936r (CNA: VulnCheck; third-party-advisory)

- https://github.com/aws/aws-encryption-sdk-java/security/advisories/GHSA-55xh-53m6-936r (ADP: CVE; vendor-advisory, x_transferred)

- https://github.com/advisories/GHSA-55xh-53m6-936r (ADP: CVE; third-party-advisory, x_transferred)

- https://vulncheck.com/advisories/vc-advisory-GHSA-55xh-53m6-936r (ADP: CVE; third-party-advisory, x_transferred)

- https://github.com/advisories/GHSA-55xh-53m6-936r (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-55xh-53m6-936r (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2024-23680; retrieved 2026-11-08; source updated 2026-11-08

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-55xh-53m6-936r; retrieved 2026-11-08; source updated 2026-07-08

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2024-23680; retrieved 2026-11-08; source updated Not reported

Revision: c4b2541b4f92227a857ddf6420be990bbbf474ae8cf471d7928e7b33b8bc68d1

Canonical: https://y2.dev/cve/CVE-2024-23680

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