Vulnerability HighRUSTSEC-2023-0083 · blurhash

RUSTSEC-2023-0083: blurhash: panic on parsing crafted blurhash inputs

Short answerA security vulnerability in the blurhash crate: blurhash: panic on parsing crafted blurhash inputs. High severity (CVSS 8.6). Fixed in 0.2.0: update to a fixed version.

Crate	blurhash
Type	Vulnerability (denial-of-service)
Affected versions	Before 0.2.0.
Fixed in	0.2.0
Severity	High, CVSS 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Published	2023-09-19
Last changed	2026-10-13
Also known as	CVE-2023-42447, GHSA-cxvp-82cq-57h2
Affected functions	`blurhash::decode`

What to do

See which version you have: cargo tree -i blurhash (it also shows which of your dependencies pulls it in).
Update within your version requirement: cargo update -p blurhash. If the fix is a newer major or minor than your requirement allows, raise it in Cargo.toml (for example blurhash = "0.2.0") or update the dependency that pulls it in.
Check again with cargo audit, or paste your Cargo.lock into our Cargo.toml checker.

Details from the advisory

Impact

The blurhash parsing code may panic due to multiple panic-guarded out-of-bounds accesses on untrusted input.

In a typical deployment, this may get triggered by feeding a maliciously crafted blurhashes over the network. These may include:

UTF-8 compliant strings containing multi-byte UTF-8 characters

Patches

The patches were released under version 0.2.0, which may require user intervention because of slight API churn.

References

From the RustSec Advisory Database (CC0-1.0) via the OSV export, downloaded Oct 24, 2026. Severity score computed from the published CVSS vector.

Up next

Are you affected?Check your whole dependency treePaste Cargo.lock: every advisory, for your exact versions.Read it next →

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