Vulnerability HighRUSTSEC-2019-0025 · serde_cbor
RUSTSEC-2019-0025: Flaw in CBOR deserializer allows stack overflow
Short answerA security vulnerability in the serde_cbor crate: Flaw in CBOR deserializer allows stack overflow. High severity (CVSS 7.5). Fixed in 0.10.2: update to a fixed version.
| Crate | serde_cbor |
|---|---|
| Type | Vulnerability (crypto-failure) |
| Affected versions | Before 0.10.2. |
| Fixed in | 0.10.2 |
| Severity | High, CVSS 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Published | 2019-10-03 |
| Last changed | 2023-11-08 |
| Also known as | CVE-2019-25001, GHSA-xr7r-88qv-q7hm |
What to do
- See which version you have:
cargo tree -i serde_cbor(it also shows which of your dependencies pulls it in). - Update within your version requirement:
cargo update -p serde_cbor. If the fix is a newer major or minor than your requirement allows, raise it in Cargo.toml (for exampleserde_cbor = "0.10.2") 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
Affected versions of this crate did not properly check if semantic tags were nested excessively during deserialization.
This allows an attacker to craft small (< 1 kB) CBOR documents that cause a stack overflow.
The flaw was corrected by limiting the allowed number of nested tags.
References
- Package: crates.io/crates/serde_cbor
- Advisory: rustsec.org/advisories/RUSTSEC-2019-0025.html
- Web: github.com/pyfisch/cbor/releases/tag/v0.10.2
From the RustSec Advisory Database (CC0-1.0) via the OSV export, downloaded Oct 24, 2026. Severity score computed from the published CVSS vector.
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