What’s Vulnerable › Vulnerabilities

CVE-2016-9954

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-04-21 · updated 2026-06-17
• Weakness: CWE-399

Description

The backtrack compilation code in the Irregex package (aka IrRegular Expressions) before 0.9.6 for Scheme allows remote attackers to cause a denial of service (memory consumption) via a crafted regular expression with a repeating pattern.

Affected products

• Irregex Project Irregex: through 0.9.5

References

• http://www.openwall.com/lists/oss-security/2016/12/15/8
• http://www.securityfocus.com/bid/94942
• https://bugzilla.redhat.com/show_bug.cgi?id=1413990
• https://github.com/ashinn/irregex/commit/a16ffc86eca15fca9e40607d41de3cea9cf868f1
• http://www.openwall.com/lists/oss-security/2016/12/15/8
• http://www.securityfocus.com/bid/94942
• https://bugzilla.redhat.com/show_bug.cgi?id=1413990
• https://github.com/ashinn/irregex/commit/a16ffc86eca15fca9e40607d41de3cea9cf868f1

Get alerted when CVE-2016-9954 or the next vulnerability affects your stack