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MEDIUM severity

CVE-2024-41256 — filestash

MEDIUM

CVE-2024-41256 is a medium-severity (CVSS 5.9) CWE-295 vulnerability in github.com/mickael-kerjean/filestash. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Filestash skips TLS certificate verification process when sending out email verification codes

Also known asGHSA-mpvx-whpp-99xjGO-2024-3035
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
None indexed
Exploitation data as of Nov 11, 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 CVE-2024-41256.

EPSS Exploitation Probability

via FIRST.org ↗
0.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs11th percentile — riskier than 11% of all scored CVEsHighest risk
0.00%0.24%0.47%0.71%0.2%0.2%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
🐹github.com/mickael-kerjean/filestash

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

Description

Default configurations in the ShareProofVerifier function of filestash v0.4 causes the application to skip the TLS certificate verification process when sending out email verification codes, possibly allowing attackers to access sensitive data via a man-in-the-middle attack.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/mickael-kerjean/filestashall versionsNo fix

Affected Products

1 product · 1 configurations
Application
filestashfilestash
≤ 0.4
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 github.com/mickael-kerjean/filestash, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of github.com/mickael-kerjean/filestash for CVE-2024-41256. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    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

Default configurations in the ShareProofVerifier function of filestash v0.4 causes the application to skip the TLS certificate verification process when sending out email verification codes, possibly allowing attackers to access sensitive data via a man-in-the-middle attack.
O3 Security · Impact-Aware SCA

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CVE-2024-41256: filestash (Medium 5.9)