CVE-2013-1802: The extlib gem 0.9.15 and earlier for Ruby does not properly restrict casts of string values, which might allo

Q: How do I fix CVE-2013-1802?

extlib: upgrade to newer than 0.9.15. Exact commands for each OS are on this page.

Q: Is CVE-2013-1802 being exploited?

CVE-2013-1802 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2013-1802 affect?

CVE-2013-1802 affects extlib. Severity is high (CVSS 7.5). The extlib gem 0.9.15 and earlier for Ruby does not properly restrict casts of string values, which might allow remote attackers to conduct object-injection attacks and execute arbitrary code, or cause a denial of service (memory and CPU co

Q: How urgent is CVE-2013-1802?

Priority 53/100. High severity; Public exploit reference

This month

HIGH 7.5UPGRADE

CVE-2013-1802 is a high-severity flaw (CVSS 7.5) affecting extlib. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The extlib gem 0.9.15 and earlier for Ruby does not properly restrict casts of string values, which might allow remote attackers to conduct object-injection attacks and execute arbitrary code, or cause a denial of service (memory and CPU consumption) by leveraging Action Pack support for (1) YAML type conversion or (2) Symbol type conversion, a similar vulnerability to CVE-2013-0156.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	3.4% (top 11%)
CISA exploited list	No
Weakness	CWE-264
Published	2013-04-09
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: dan kubb

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2013-04-09 20:55 UTCPublished CVE record published
2026-06-16 23:52 UTCUpdated Record last modified

dan kubb extlib UPGRADE

Affected: <= 0.9.15 · 0.9.2 · 0.9.3 · 0.9.4 · 0.9.5 · 0.9.6 · 0.9.7 · 0.9.8

Fixed in: newer than 0.9.15

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy extlib || rpm -q extlib || extlib --version

2. UPGRADE to newer than 0.9.15 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade extlib

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade extlib

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2013-1802?

extlib: upgrade to newer than 0.9.15. Exact commands for each OS are on this page.

Is CVE-2013-1802 being exploited?

CVE-2013-1802 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2013-1802 affect?

CVE-2013-1802 affects extlib. Severity is high (CVSS 7.5). The extlib gem 0.9.15 and earlier for Ruby does not properly restrict casts of string values, which might allow remote attackers to conduct object-injection attacks and execute arbitrary code, or cause a denial of service (memory and CPU co

How urgent is CVE-2013-1802?

Priority 53/100. High severity; Public exploit reference

Software pages

Ruby vulnerabilities

References

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