MEDIUM GitHub
CVE-2026-45822
decode-uri-component: Denial of service via exponential decoding of malformed percent-encoded input
### Impact
An attacker who can supply input to `decodeUriComponent()` (directly or via a dependency that uses this package on URL/query/path data) can cause excessive CPU usage and application unresponsiveness. This is an availability issue; there is no known memory corruption, data disclosure, or remote code execution impact.
### Patches
Upgrade to `decode-uri-component@0.5.0`.
### Workarounds
Limit the size of the input.
Affected Products
- npm/decode-uri-component <= 0.4.2
References
- https://github.com/advisories/GHSA-vcc3-ghjq-m6fr
- https://github.com/SamVerschueren/decode-uri-component/security/advisories/GHSA-vcc3-ghjq-
- https://nvd.nist.gov/vuln/detail/CVE-2026-45822
- https://github.com/SamVerschueren/decode-uri-component/commit/fa479dafeede7bedf04e5c89aa78
This medium severity vulnerability was published on 2026-08-31 via GitHub. Affected: npm/decode-uri-component <= 0.4.2.
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