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MEDIUM severity

CVE-2019-16354 — beego

MEDIUMFix: beego/beego#3975

CVE-2019-16354 is a medium-severity (CVSS 4.7) CWE-362 vulnerability in github.com/beego/beego. A fix is available for github.com/beego/beego — see the affected versions and patch details below.

Beego has a file creation race condition

Also known asCVE-2019-16355GHSA-f6px-w8rh-7r89GHSA-hf4p-4j9r-3cvxGO-2021-0084
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Nov 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs10th percentile — riskier than 10% of all scored CVEsHighest risk
0.00%0.23%0.47%0.70%0.0%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

2 pkgs affected
🐹github.com/beego/beego🐹github.com/astaxie/beego

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

The File Session Manager in Beego 1.10.0 allows local users to read session files because there is a race condition involving file creation within a directory with weak permissions.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/beego/beegoall versions1.12.2go get github.com/beego/beego@v1.12.2
🐹Gogithub.com/astaxie/beegoall versions1.12.2go get github.com/astaxie/beego@v1.12.2

Affected Products

1 product · 1 configurations
Application
beegobeego
1 version
1.10.0

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/beego/beego, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update github.com/beego/beego to 1.12.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-16354 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

The File Session Manager in Beego 1.10.0 allows local users to read session files because there is a race condition involving file creation within a directory with weak permissions.
O3 Security · Impact-Aware SCA

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CVE-2019-16354: beego — Fixed in 1.12.2