CVE-2026-75090

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory (severity: LOW) published 2026-08-18. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this weekElevated
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 4.3Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A vulnerability was detected in EricLBuehler Mistral.rs up to 0.8.22. Affected by this issue is the function convert_gguf_to_hf_tokenizer of the file mistralrs-core/src/gguf/gguf_tokenizer.rs of the component GGUF Tokenizer. The manipulation of the argument eos_token_id/bos_token_id/unknown_token_id results in out-of-bounds read. The attack can be executed remotely. The exploit is now public and may be used. Upgrading to version 0.8.23 can resolve this issue. The patch is identified as cd5297e2ea5cb27c790bdcf2f3c2f1064a81d55e. Upgrading the affected component is recommended.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
50(Attend)
EG Risk 50/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity43% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
42%
KEV
Not listed

Published

August 18, 2026

Last Modified

August 20, 2026

Advisory Details (5)

Auto-updated Aug 18, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr, github_commit, github_release.
generic

GitHub - EricLBuehler/mistral.rs: Fast, flexible LLM inference · GitHub

https://github.com/EricLBuehler/mistral.rs/
github_release Patch Available

v0.8.23

Patch available: EricLBuehler/mistral.rs v0.8.23

https://github.com/EricLBuehler/mistral.rs/releases/tag/v0.8.23
github_commit

commit cd5297e2ea5c (EricLBuehler/mistral.rs)

Fix landed in EricLBuehler/mistral.rs commit cd5297e2ea5c — awaiting tagged release

https://github.com/EricLBuehler/mistral.rs/commit/cd5297e2ea5cb27c790bdcf2f3c2f1064a81d55e
github_pr

Validate GGUF special token ids against vocab to prevent OOB panic

Fix merged in EricLBuehler/mistral.rs PR #2282 on 2026-06-25 — awaiting tagged release

https://github.com/EricLBuehler/mistral.rs/pull/2282
generic🟡 PoC Available

Out-of-bounds index panic (DoS) via unvalidated GGUF token ID in mistral.rs tokenizer loader · Issue #2225 · EricLBuehler/mistral.rs · GitHub

https://github.com/EricLBuehler/mistral.rs/issues/2225

Vendor Advisories for CVE-2026-75090(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 17× in last 7d / 17× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-20 12:59 UTCEG score recompute
  3. 2026-08-20 12:59 UTCGHSA enrichment
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 14:22 UTCEG score recompute
  6. 2026-08-19 14:22 UTCGHSA enrichment
  7. 2026-08-18 14:49 UTCEG score recompute
  8. 2026-08-18 14:48 UTCGHSA enrichment
  9. 2026-08-18 13:50 UTCEG score recompute
  10. 2026-08-18 13:49 UTCGHSA enrichment
  11. 2026-08-18 13:49 UTCEPSS rescore
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 13:45 UTCMITRE cvelistV5CVSS v4 → 5.3
  14. 2026-08-18 02:20 UTCEG score recompute
  15. 2026-08-18 02:19 UTCNVD updateCVSS v4 → 2.1
  16. 2026-08-18 01:47 UTCEG score recompute
  17. 2026-08-18 01:46 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-75090?
CVE-2026-75090 is a medium vulnerability published on August 18, 2026. A vulnerability was detected in EricLBuehler Mistral.rs up to 0.8.22. Affected by this issue is the function convertgguftohftokenizer of the file mistralrs-core/src/gguf/gguftokenizer.rs of the component GGUF Tokenizer. The manipulation of the argument eostokenid/bostokenid/unknowntoken_id results…
When was CVE-2026-75090 disclosed?
CVE-2026-75090 was first published in the National Vulnerability Database on August 18, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-75090 actively exploited?
CVE-2026-75090 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 58.3% of all scored CVEs.
What is the CVSS score of CVE-2026-75090?
CVE-2026-75090 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-75090?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-75090, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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