CVE-2026-24850

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 78% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: Elevated riskExposed: 0

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

The ML-DSA crate is a Rust implementation of the Module-Lattice-Based Digital Signature Standard (ML-DSA). Starting in version 0.0.4 and prior to version 0.1.0-rc.4, the ML-DSA signature verification implementation in the RustCrypto ml-dsa crate incorrectly accepts signatures with repeated (duplicate) hint indices. According to the ML-DSA specification (FIPS 204 / RFC 9881), hint indices within each polynomial must be strictly increasing. The current implementation uses a non-strict monotonic check (<= instead of <), allowing duplicate indices. This is a regression bug. The original implementation was correct, but a commit in version 0.0.4 inadvertently changed the strict < comparison to <=, introducing the vulnerability. Version 0.1.0-rc.4 fixes the issue.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
55(Attend)
EG Risk 55/100SSVC: 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
Severity53% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

January 28, 2026

Last Modified

June 17, 2026

Advisory Details (10)

Auto-updated Aug 9, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit, github_pr.
github_pr

Make ML-DSA signature decoding follow the spec

Fix merged in RustCrypto/signatures PR #895 on 2025-02-12 — awaiting tagged release

https://github.com/RustCrypto/signatures/pull/895
generic

ml-dsa: some valid signature values don't successfully round trip through encode + decode · Issue #894 · RustCrypto/signatures · GitHub

https://github.com/RustCrypto/signatures/issues/894
github_commit

commit b01c3b73dd08 (RustCrypto/signatures)

Fix landed in RustCrypto/signatures commit b01c3b73dd08 — awaiting tagged release

https://github.com/RustCrypto/signatures/commit/b01c3b73dd08d0094e089aa234f78b6089ec1f38
github_commit

commit 400961412be2 (RustCrypto/signatures)

Fix landed in RustCrypto/signatures commit 400961412be2 — awaiting tagged release

https://github.com/RustCrypto/signatures/commit/400961412be2e2ab787942cf30e0a9b66b37a54a
generic

wycheproof/testvectors_v1/mldsa_87_verify_test.json at main · C2SP/wycheproof · GitHub

https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_87_verify_test.json
generic

wycheproof/testvectors_v1/mldsa_65_verify_test.json at main · C2SP/wycheproof · GitHub

https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_65_verify_test.json
generic

wycheproof/testvectors_v1/mldsa_44_verify_test.json at main · C2SP/wycheproof · GitHub

https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_44_verify_test.json
generic

GitHub - C2SP/wycheproof: Project Wycheproof tests crypto libraries against known attacks. · GitHub

https://github.com/C2SP/wycheproof
generic

RFC 9881 - Internet X.509 Public Key Infrastructure -- Algorithm Identifiers for the Module-Lattice-Based Digital Signature Algorithm (ML-DSA)

https://datatracker.ietf.org/doc/html/rfc9881
generic

FIPS 204, Module-Lattice-Based Digital Signature Standard | CSRC

https://csrc.nist.gov/pubs/fips/204/final

Affected Packages

(1 across 1 ecosystem)
crates.io(1)
PackageVulnerable rangeFixed inDependents
ml-dsa—0.1.0-rc.4—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 26× 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.

Showing the most recent 100 of 179 total refreshes for this CVE.

  1. 2026-09-19 00:06 UTCOSV refresh
  2. 2026-09-18 19:27 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2026-24850?
CVE-2026-24850 is a medium vulnerability published on January 28, 2026. The ML-DSA crate is a Rust implementation of the Module-Lattice-Based Digital Signature Standard (ML-DSA). Starting in version 0.0.4 and prior to version 0.1.0-rc.4, the ML-DSA signature verification implementation in the RustCrypto ml-dsa crate incorrectly accepts signatures with repeated…
When was CVE-2026-24850 disclosed?
CVE-2026-24850 was first published in the National Vulnerability Database on January 28, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-24850 actively exploited?
CVE-2026-24850 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 75.1% of all scored CVEs.
What is the CVSS score of CVE-2026-24850?
CVE-2026-24850 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-24850?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-24850, 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.

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