# Zstd-Rs Zstd-Safe vulnerabilities

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

Junglewise Threat Intelligence has tracked 5 vulnerabilities in Zstd-Rs Zstd-Safe: 0 in the last 7 days and 5 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, zstd-safe use-after-free in multithreaded compression context, was published on 16 October 2026. 5 vulnerabilities in the last four weeks, up from none in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 5
- Last 90 days: 5
- All time: 5 (0 critical, 0 exploited in the wild)

## About Zstd-Rs Zstd-Safe

Rust wrapper providing safe bindings to the Zstandard compression library.

## Latest Zstd-Rs Zstd-Safe vulnerabilities

- [zstd-safe use-after-free in multithreaded compression context](https://junglewise.ai/threats/rustsec-2026-0406-use-after-free-when-changing-a-multithreaded-context-0c474512) (info, published 16 Oct 2026)
- [zstd-safe use-after-free in dictionary decompression context](https://junglewise.ai/threats/rustsec-2026-0400-use-after-free-of-a-dictionary-after-a-one-shot-call-541157eb) (info, published 16 Oct 2026)
- [zstd-safe heap buffer overflow in CCtx::try_clone](https://junglewise.ai/threats/rustsec-2026-0402-heap-buffer-overflow-in-cctx-try-clone-on-a-8f6c7847) (info, published 16 Oct 2026)
- [zstd-safe memory exposure in streaming decompression](https://junglewise.ai/threats/rustsec-2026-0403-uninitialized-memory-exposed-when-streaming-b7ceb3c6) (info, published 16 Oct 2026)
- [zstd-safe out-of-bounds read in train_from_buffer with sample size overflow](https://junglewise.ai/threats/rustsec-2026-0401-out-of-bounds-read-in-train-from-buffer-when-sample-b8e1d058) (info, published 16 Oct 2026)

## Most severe Zstd-Rs Zstd-Safe vulnerabilities

- [zstd-safe use-after-free in multithreaded compression context](https://junglewise.ai/threats/rustsec-2026-0406-use-after-free-when-changing-a-multithreaded-context-0c474512) (info, published 16 Oct 2026)
- [zstd-safe use-after-free in dictionary decompression context](https://junglewise.ai/threats/rustsec-2026-0400-use-after-free-of-a-dictionary-after-a-one-shot-call-541157eb) (info, published 16 Oct 2026)
- [zstd-safe heap buffer overflow in CCtx::try_clone](https://junglewise.ai/threats/rustsec-2026-0402-heap-buffer-overflow-in-cctx-try-clone-on-a-8f6c7847) (info, published 16 Oct 2026)
- [zstd-safe memory exposure in streaming decompression](https://junglewise.ai/threats/rustsec-2026-0403-uninitialized-memory-exposed-when-streaming-b7ceb3c6) (info, published 16 Oct 2026)
- [zstd-safe out-of-bounds read in train_from_buffer with sample size overflow](https://junglewise.ai/threats/rustsec-2026-0401-out-of-bounds-read-in-train-from-buffer-when-sample-b8e1d058) (info, published 16 Oct 2026)

## Vulnerabilities per week

5 vulnerabilities in the last four weeks, up from none 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 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 5 | 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 |

## 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, "Zstd-Rs Zstd-Safe vulnerabilities", https://junglewise.ai/threats/technologies/zstd-rs-zstd-safe, 9 November 2026.