Deno.env.toObject() ignores the variables listed in --deny-env and returns all environment variables
Description
Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to versions 2.1.13 and 2.2.13, the Deno.env.toObject method ignores any variables listed in the --deny-env option of the deno run command. When looking at the documentation of the --deny-env option this might lead to a false impression that variables listed in the option are impossible to read. Software relying on the combination of both flags to allow access to most environment variables except a few sensitive ones will be vulnerable to malicious code trying to steal secrets using the Deno.env.toObject() method. Versions 2.1.13 and 2.2.13 contains a patch.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
denocrates.io | < 2.1.13 | 2.1.13 |
denocrates.io | >= 2.2.0, < 2.2.13 | 2.2.13 |
deno_runtimecrates.io | < 0.212.0 | 0.212.0 |
Affected products
3- ghsa-coords2 versions
< 2.1.13+ 1 more
- (no CPE)range: < 2.1.13
- (no CPE)range: < 0.212.0
Patches
Vulnerability mechanics
References
8- github.com/advisories/GHSA-7w8p-chxq-2789ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-48934ghsaADVISORY
- docs.deno.com/api/deno/~/Deno.Env.toObjectghsax_refsource_MISCWEB
- docs.deno.com/runtime/fundamentals/security/ghsax_refsource_MISCWEB
- github.com/denoland/deno/commit/2959e083912420988066a001c2b2d6732a1b562fghsax_refsource_MISCWEB
- github.com/denoland/deno/commit/946ccda1aa19a00c478a5e6826b75053b050d753ghsax_refsource_MISCWEB
- github.com/denoland/deno/pull/29079ghsax_refsource_MISCWEB
- github.com/denoland/deno/security/advisories/GHSA-7w8p-chxq-2789ghsax_refsource_CONFIRMWEB
News mentions
0No linked articles in our index yet.