Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Primary rating from GitHub Advisory.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Lifecycle Timeline
5DescriptionGitHub Advisory
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.
Analysis
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.
Technical ContextAI
This vulnerability is classified as Improper Verification of Cryptographic Signature (CWE-347).
RemediationAI
A vendor patch is available. Apply it as soon as possible and verify the fix.
More from same product – last 7 days
Remote code execution in Vitest Browser Mode (npm @vitest/browser 3.0.0-3.2.4, 4.0.0-4.1.7, 5.0.0-beta.0-5.0.0-beta.3) a
Remote prototype pollution in i18next-http-middleware before 3.9.7 allows unauthenticated attackers to write to Object.p
Prototype pollution in ApostropheCMS versions up to and including 4.30.0 allows an authenticated editor to poison Object
Code injection in OpenZeppelin Contracts Wizard's `@openzeppelin/wizard` npm package (<=0.10.8) allows attacker-supplied
Stored cross-site scripting in the @apostrophecms/seo plugin (versions ≤1.4.2) allows any user holding the default edito
Vendor StatusVendor
SUSE
Severity: MediumShare
External POC / Exploit Code
Leaving vuln.today
EUVD-2025-16794
GHSA-2x3r-hwv5-p32x