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Not in CISA KEV
LOW severity

Unauthenticated Nonce Increment in snowGHSA-7g9j-g5jg-3vv3

LOWFix: mcginty/snow@12e8ae5

GHSA-7g9j-g5jg-3vv3 is a low-severity (CVSS 3.1) CWE-642 vulnerability in snow. A fix is available for snow — see the affected versions and patch details below.

Also known asCVE-2024-58265RUSTSEC-2024-0011
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-7g9j-g5jg-3vv3.

EPSS Exploitation Probability

via FIRST.org ↗
0.5%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs41th percentile — riskier than 41% of all scored CVEsHighest risk
0.00%0.32%0.65%0.97%0.1%0.5%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🦀snow

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.

Description

Impact

There was a logic bug where unauthenticated payloads could still cause a nonce increment in snow's internal state. For an attacker with the ability to inject packets into the channel Noise is talking over, this allows a denial-of-service type attack which could prevent communication as it causes the sending and receiving side to be expecting different nonce values than would arrive.

Note that this only affects those who are using the stateful TransportState, not those using StatelessTransportState.

Patches

This has been patched in version 0.9.5, and all users are recommended to update.

References

There will be a more formal report of this in the near future.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🦀crates.iosnowall versions0.9.5cargo update -p snow --precise 0.9.5

Affected Products

1 product · 1 configurations
Application
snowmcginty
< 0.9.5
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for snow, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update snow to 0.9.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-7g9j-g5jg-3vv3 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

### Impact There was a logic bug where unauthenticated payloads could still cause a nonce increment in snow's internal state. For an attacker with the ability to inject packets into the channel Noise is talking over, this allows a denial-of-service type attack which could prevent communication as it causes the sending and receiving side to be expecting different nonce values than would arrive. Note that this only affects those who are using the stateful `TransportState`, not those using `StatelessTransportState`. ### Patches This has been patched in version 0.9.5, and all users are recommend
O3 Security · Impact-Aware SCA

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Unauthenticated Nonce Increment in snow (Low 3.1)