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💎 RubyGems
Not in CISA KEV
HIGH severity

CVE-2015-3649 — open-uri-cached

HIGH

CVE-2015-3649 is a high-severity (CVSS 7.8) Improper Input Validation vulnerability in open-uri-cached. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

open-uri-cached Gem for Ruby Unsafe Temporary File Creation Enables Code Execution

Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
None indexed
Exploitation data as of Oct 25, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs33th percentile — riskier than 33% of all scored CVEsHighest risk
0.00%0.30%0.59%0.89%0.1%0.4%Apr 26Aug 26Oct 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
💎open-uri-cached

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

Description

The open-uri-cached rubygem allows local users to execute arbitrary Ruby code by creating a directory under /tmp containing "openuri-" followed by a crafted UID, and putting Ruby code in said directory once a meta file is created.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
💎RubyGemsopen-uri-cachedall versionsNo fix

Affected Products

1 product · 1 configurations
Application
open-uri-cachedopen-uri-cached_project
1 version
0.0.5

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for open-uri-cached, 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 open-uri-cached for CVE-2015-3649. 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

The open-uri-cached rubygem allows local users to execute arbitrary Ruby code by creating a directory under /tmp containing "openuri-" followed by a crafted UID, and putting Ruby code in said directory once a metafile is created.
O3 Security · Impact-Aware SCA

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CVE-2015-3649: open-uri-cached (High 7.8)