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GHSA-435g-fcv3-8j26Published

libcrux before 0.0.6 Cryptographic Implementation Bug Fixes

Recorded JSON

Collected exploitation and prediction evidence

Risk source coverage

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-76234

Published

libcrux-ecdh and libcrux-ed25519 before 0.0.6, and libcrux-psq before 0.0.7, contain cryptographic implementation bugs. libcrux-ecdh did not properly check length and clamping during X25519 secret validation (and had a broken clamping check for imported X25519 secret keys); libcrux-ed25519 performed a duplicated clamping step during key generation; and libcrux-psq panicked instead of propagating an AEADError. These were fixed in the respective patched releases.

Source published
19 Aug 2026 14:02:14 UTC
Source modified
21 Aug 2026 11:21:07 UTC
Observed here
23 Oct 2026 15:48:27 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.1 · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

euvd · EUVD-2026-62475

Published

libcrux-ecdh and libcrux-ed25519 before 0.0.6, and libcrux-psq before 0.0.7, contain cryptographic implementation bugs. libcrux-ecdh did not properly check length and clamping during X25519 secret validation (and had a broken clamping check for imported X25519 secret keys); libcrux-ed25519 performed a duplicated clamping step during key generation; and libcrux-psq panicked instead of propagating an AEADError. These were fixed in the respective patched releases.

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Aug 19, 2026, 2:02:14 PM

dateUpdated: Aug 21, 2026, 11:21:07 AM

Source published
Aug 19, 2026, 2:02:14 PM (timezone not stated)
Source modified
Aug 21, 2026, 11:21:07 AM (timezone not stated)
Observed here
30 Oct 2026 11:56:37 UTC
Source terms
ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 4.0 · 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

nvd · CVE-2026-76234

Published

libcrux-ecdh and libcrux-ed25519 before 0.0.6, and libcrux-psq before 0.0.7, contain cryptographic implementation bugs. libcrux-ecdh did not properly check length and clamping during X25519 secret validation (and had a broken clamping check for imported X25519 secret keys); libcrux-ed25519 performed a duplicated clamping step during key generation; and libcrux-psq panicked instead of propagating an AEADError. These were fixed in the respective patched releases.

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Deferred

Weakness classifications: CWE-347

Original publisher date fields

published: 2026-08-19T14:17:52.797

lastModified: 2026-10-27T13:10:00.360

Source published
19 Aug 2026 14:17:52 UTC
Source modified
27 Oct 2026 13:10:00 UTC
Observed here
27 Oct 2026 16:45:50 UTC
Source terms
NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · [email protected] · Secondary · 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS 3.1 · [email protected] · Secondary · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

osv · GHSA-435g-fcv3-8j26

Published

In accordance with our [security policy for `libcrux`](https://github.com/cryspen/libcrux/blob/main/SECURITY.md), we publish a GitHub security advisory for any releases whose CHANGELOG includes bug-fixes, and encourage our users to upgrade. The latest releases of the `libcrux-ecdh`, `libcrux-ed25519` and `libcrux-psq` crates contain the following bug-fixes: ## `libcrux-ecdh` - [#1301](https://github.com/cryspen/libcrux/pull/1301): Check length and clamping in X25519 secret validation. This is a breaking change since errors are now raised on unclamped X25519 secrets or inputs of the wrong length ## `libcrux-ed25519` - [#1320](https://github.com/cryspen/libcrux/pull/1320): Remove duplicated clamping step during key generation The issue fixed in #1320 was first reported by Nadim Kobeissi. ## `libcrux-psq` - [#1319](https://github.com/cryspen/libcrux/pull/1319): Propagate AEADError instead of panicking - [#1301](https://github.com/cryspen/libcrux/pull/1301): Fix broken clamping check for imported X25519 secret keys The issue fixed in #1319 was first reported by Nadim Kobeissi.

Source published
12 Feb 2026 22:12:14 UTC
Source modified
20 Aug 2026 04:03:48 UTC
Observed here
24 Oct 2026 13:19:54 UTC
Source terms
GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N

Publisher rating · LOW

osv · RUSTSEC-2026-0023

Published

The latest releases of the libcrux-ecdh crate contains the following bug-fix: [#1301](https://github.com/cryspen/libcrux/pull/1301): Check length and clamping in X25519 secret validation. This is a breaking change since errors are now raised on unclamped X25519 secrets or inputs of the wrong length

Source published
26 Jan 2026 12:00:00 UTC
Source modified
24 Aug 2026 08:08:07 UTC
Observed here
24 Oct 2026 13:19:54 UTC
Source terms
OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N

osv · RUSTSEC-2026-0024

Published

The latest releases of the libcrux-psq crate contains the following bug-fix: [#1301](https://github.com/cryspen/libcrux/pull/1301): Fix broken clamping check for imported X25519 secret keys

Source published
26 Jan 2026 12:00:00 UTC
Source modified
24 Aug 2026 08:08:07 UTC
Observed here
24 Oct 2026 13:19:54 UTC
Source terms
OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N

osv · RUSTSEC-2026-0025

Published

The latest releases of the libcrux-psq crate contains the following bug-fix: [#1319](https://github.com/cryspen/libcrux/pull/1319): Propagate AEADError instead of panicking The issue fixed in [#1319](https://github.com/cryspen/libcrux/pull/1319) was first reported by Nadim Kobeissi.

Source published
8 Feb 2026 12:00:00 UTC
Source modified
24 Aug 2026 08:08:07 UTC
Observed here
24 Oct 2026 13:19:54 UTC
Source terms
OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

osv · RUSTSEC-2026-0026

Published

The latest releases of the libcrux-ed25519 crate contains the following bug-fix: [#1320](https://github.com/cryspen/libcrux/pull/1320): Remove duplicated clamping step during key generation The issue fixed in [#1320](https://github.com/cryspen/libcrux/pull/1320) was first reported by Nadim Kobeissi.

Source published
5 Feb 2026 12:00:00 UTC
Source modified
24 Aug 2026 08:08:07 UTC
Observed here
24 Oct 2026 13:19:54 UTC
Source terms
OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 1 Nov 06:54 UTC · 272 of 272 readable · 269 fully read · documentation 469/469 current

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