CVE-2025-24015

Public Exploit
Deno's AES GCM authentication tags are not verified

Description

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Versions 1.46.0 through 2.1.6 have an issue that affects AES-256-GCM and AES-128-GCM in Deno in which the authentication tag is not being validated. This means tampered ciphertexts or incorrect keys might not be detected, which breaks the guarantees expected from AES-GCM. Older versions of Deno correctly threw errors in such cases, as does Node.js. Without authentication tag verification, AES-GCM degrades to essentially CTR mode, removing integrity protection. Authenticated data set with set_aad is also affected, as it is incorporated into the GCM hash (ghash) but this too is not validated, rendering AAD checks ineffective. Version 2.1.7 includes a patch that addresses this issue.

Category

7.7
CVSS
Severity: High
CVSS 4.0 •
CVSS 3.1 •
EPSS 0.05%
Vendor Advisory github.com
Affected: denoland deno
Published at:
Updated at:

References

Link Tags
https://github.com/denoland/deno/security/advisories/GHSA-2x3r-hwv5-p32x vendor advisory patch exploit
https://github.com/denoland/deno/commit/0d1beed patch
https://github.com/denoland/deno/commit/4f27d7cdc02e3edfb9d36275341fb8185d6e99ed patch
https://github.com/denoland/deno/commit/a4003a5292bd0affefad3ecb24a8732886900f67 patch

Frequently Asked Questions

What is the severity of CVE-2025-24015?
CVE-2025-24015 has been scored as a high severity vulnerability.
How to fix CVE-2025-24015?
To fix CVE-2025-24015, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-24015 being actively exploited in the wild?
It is possible that CVE-2025-24015 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-24015?
CVE-2025-24015 affects denoland deno.
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