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Vulnerability record · CVE-2017-0903 · published 11 October 2017

CVE-2017-0903: Rubygems deserialization of untrusted data vulnerability

Rubygems · Rubygems

RubyGems versions between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability. YAML deserialization of gem specifications can bypass class white lists. Specially crafted serialized objects can possibly be used to escalate to remote code execution.

9.8 CVSS 3.0 Critical EPSS 16% · top 3.2% CWE-502 · Deserialization of untrusted data
9.8CVSS 3.0 base score, v2 7.5
16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
9Affected product versions listed by NVD
26References
17 Jun 2026Last modified by NVD

Description

RubyGems versions between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability. YAML deserialization of gem specifications can bypass class white lists. Specially crafted serialized objects can possibly be used to escalate to remote code execution.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

9 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://blog.rubygems.org/2017/10/09/2.6.14-released.html Vendor Advisory
http://blog.rubygems.org/2017/10/09/unsafe-object-deserialization-vulnerability.html Vendor Advisory
http://www.securityfocus.com/bid/101275 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2017:3485 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0378 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0583 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0585 Third Party Advisory
https://github.com/rubygems/rubygems/commit/510b1638ac9bba3ceb7a5d73135dafff9e5bab49 PatchThird Party Advisory
https://hackerone.com/reports/274990 Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html Mailing ListThird Party Advisory
https://usn.ubuntu.com/3553-1/ Third Party Advisory
https://usn.ubuntu.com/3685-1/ Third Party Advisory
https://www.debian.org/security/2017/dsa-4031 Third Party Advisory
http://blog.rubygems.org/2017/10/09/2.6.14-released.html Vendor Advisory
http://blog.rubygems.org/2017/10/09/unsafe-object-deserialization-vulnerability.html Vendor Advisory
http://www.securityfocus.com/bid/101275 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2017:3485 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0378 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0583 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0585 Third Party Advisory
https://github.com/rubygems/rubygems/commit/510b1638ac9bba3ceb7a5d73135dafff9e5bab49 PatchThird Party Advisory
https://hackerone.com/reports/274990 Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html Mailing ListThird Party Advisory
https://usn.ubuntu.com/3553-1/ Third Party Advisory
https://usn.ubuntu.com/3685-1/ Third Party Advisory
https://www.debian.org/security/2017/dsa-4031 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2017-0903), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.