Your RSA-2048 keys break in 2030. Find every one of them before attackers do.
🦀
🦀 crates.io
Not in CISA KEV
HIGH severity

CVE-2021-38192 — prost-types

HIGHFix: tokio-rs/prost#439

CVE-2021-38192 is a high-severity (CVSS 7.5) CWE-120 vulnerability in prost-types. 1 public exploit reference exists, so weaponization risk is real. A fix is available for prost-types — see the affected versions and patch details below.

Overflow in prost-types

Also known asRUSTSEC-2021-0073
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Oct 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.1%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs65th percentile — riskier than 65% of all scored CVEsHighest risk
0.00%0.53%1.07%1.60%0.3%1.1%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2021-38192 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,987 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
🦀prost-types

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.

Description

Affected versions of this crate contained a bug in which untrusted input could cause an overflow and panic when converting a Timestamp to SystemTime. It is recommended to upgrade to prost-types v0.8 and switch the usage of From<Timestamp> for SystemTime to TryFrom<Timestamp> for SystemTime.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🦀crates.ioprost-typesall versions0.8.0cargo update -p prost-types --precise 0.8.0

Affected Products

1 product · 1 configurations
Application
prostprost_project
< 0.8.0
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

An issue was discovered in the prost-types crate before 0.8.0 for Rust. …

rustsec.orgNVDAug 2021

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for prost-types, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update prost-types to 0.8.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-38192 is resolved across your whole dependency graph.

  3. Workarounds

    Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable.

Frequently Asked Questions

Affected versions of this crate contained a bug in which untrusted input could cause an overflow and panic when converting a Timestamp to SystemTime. It is recommended to upgrade to prost-types v0.8 and switch the usage of From<Timestamp> for SystemTime to TryFrom<Timestamp> for SystemTime.
O3 Security · Impact-Aware SCA

Is CVE-2021-38192 in your dependencies?

Find it across crates.io, including transitive dependencies.

Scan my dependencies How O3 SCA works
CVE-2021-38192: prost-types — Fixed in 0.8.0