CVE-2025-24015
Deno is a JavaScript, TypeScript, and WebAssembly runtime.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.27%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 4.0
- 7.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.27% probability · 20th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-347
- Affected
- deno/deno
- Source
- security-advisories@github.com
References
- https://github.com/denoland/deno/commit/0d1beedPatch
- https://github.com/denoland/deno/commit/4f27d7cdc02e3edfb9d36275341fb8185d6e99edPatch
- https://github.com/denoland/deno/commit/a4003a5292bd0affefad3ecb24a8732886900f67Patch
- https://github.com/denoland/deno/security/advisories/GHSA-2x3r-hwv5-p32xExploit, Patch, Vendor Advisory
- https://github.com/denoland/deno/security/advisories/GHSA-2x3r-hwv5-p32xExploit, Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.