Description
@std/toml is the Deno Standard Library. Prior to version 1.0.9, an attacker can pollute the prototype chain in Node.js runtime and Browser when parsing untrusted TOML data, thus achieving Prototype Pollution (PP) vulnerability. This is because the library is merging an untrusted object with an empty object, which by default the empty object has the prototype chain. This issue has been patched in version 1.0.9.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_confirm
https://github.com/denoland/std/security/advisories/GHSA-crjp-8r9q-2j9r
Patch x_refsource_misc
https://github.com/denoland/std/commit/540662cfd6d71e969af292aa604ef4049dbe271b
Release Notes x_refsource_misc
https://github.com/denoland/std/releases/tag/release-2025.08.13
Scores
CVSS v3
7.3
EPSS
0.0031
EPSS Percentile
22.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-1321
Status
published
Products (1)
denoland/std
< 1.0.9
Published
Aug 14, 2025
Tracked Since
Feb 18, 2026