# pqc_kyber (crates.io) vulnerabilities

Source: https://junglewise.ai/threats/technologies/pqc-kyber  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/pqc-kyber.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 4 vulnerabilities in pqc_kyber (crates.io): 0 in the last 7 days and 2 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, pqc_kyber Rust library unmaintained with unpatched flaw, was published on 17 September 2026. Nothing in the last four weeks, down from 1 vulnerability in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 2
- All time: 4 (0 critical, 0 exploited in the wild)

## About pqc_kyber (crates.io)

Rust implementation of the Kyber post-quantum key encapsulation mechanism.

## Latest pqc_kyber (crates.io) vulnerabilities

- [pqc_kyber Rust library unmaintained with unpatched flaw](https://junglewise.ai/threats/rustsec-2026-0289-pqc-kyber-is-unmaintained-e19367b2) (info, published 17 Sep 2026)
- [RUSTSEC-2026-0290 - pqc_kyber: AVX2 backend skips Fujisaki-Okamoto implicit rejection, enabling chosen-ciphertext key recovery](https://junglewise.ai/threats/rustsec-2026-0290-pqc-kyber-avx2-backend-skips-fujisaki-okamoto-5f69a5b0) (low, CVSS 3.1, published 16 Aug 2026)
- [pqc_kyber KyberSlash: division timings depending on secrets](https://junglewise.ai/threats/pqc-kyber-kyberslash-division-timings-depending-on-secrets-93d94e36) (low, CVSS 3.1, published 9 Feb 2024)
- [RUSTSEC-2023-0079 - KyberSlash: division timings depending on secrets](https://junglewise.ai/threats/rustsec-2023-0079-kyberslash-division-timings-depending-on-secrets-6aa36d51) (low, CVSS 3.1, published 1 Dec 2023)

## Most severe pqc_kyber (crates.io) vulnerabilities

- [RUSTSEC-2026-0290 - pqc_kyber: AVX2 backend skips Fujisaki-Okamoto implicit rejection, enabling chosen-ciphertext key recovery](https://junglewise.ai/threats/rustsec-2026-0290-pqc-kyber-avx2-backend-skips-fujisaki-okamoto-5f69a5b0) (low, CVSS 3.1, published 16 Aug 2026)
- [pqc_kyber KyberSlash: division timings depending on secrets](https://junglewise.ai/threats/pqc-kyber-kyberslash-division-timings-depending-on-secrets-93d94e36) (low, CVSS 3.1, published 9 Feb 2024)
- [RUSTSEC-2023-0079 - KyberSlash: division timings depending on secrets](https://junglewise.ai/threats/rustsec-2023-0079-kyberslash-division-timings-depending-on-secrets-6aa36d51) (low, CVSS 3.1, published 1 Dec 2023)
- [pqc_kyber Rust library unmaintained with unpatched flaw](https://junglewise.ai/threats/rustsec-2026-0289-pqc-kyber-is-unmaintained-e19367b2) (info, published 17 Sep 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 1 vulnerability in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 1 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other crates.io technologies

- [surrealdb (crates.io)](https://junglewise.ai/threats/technologies/surrealdb): 83 vulnerabilities
- [wasmtime (crates.io)](https://junglewise.ai/threats/technologies/wasmtime): 67 vulnerabilities
- [deno (crates.io)](https://junglewise.ai/threats/technologies/deno): 39 vulnerabilities
- [zebrad (crates.io)](https://junglewise.ai/threats/technologies/zebrad): 27 vulnerabilities
- [russh (crates.io)](https://junglewise.ai/threats/technologies/crates-io-russh): 26 vulnerabilities
- [openssl-src (crates.io)](https://junglewise.ai/threats/technologies/openssl-src): 26 vulnerabilities
- [openssl (crates.io)](https://junglewise.ai/threats/technologies/crates-io-openssl): 25 vulnerabilities
- [rustfs (crates.io)](https://junglewise.ai/threats/technologies/rustfs): 25 vulnerabilities
- [coreutils (crates.io)](https://junglewise.ai/threats/technologies/crates-io-coreutils): 21 vulnerabilities
- [ckb (crates.io)](https://junglewise.ai/threats/technologies/ckb): 19 vulnerabilities
- [apollo-router (crates.io)](https://junglewise.ai/threats/technologies/apollo-router): 13 vulnerabilities
- [deepseek-tui (crates.io)](https://junglewise.ai/threats/technologies/deepseek-tui): 13 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "pqc_kyber (crates.io) vulnerabilities", https://junglewise.ai/threats/technologies/pqc-kyber, 9 November 2026.