CVE-2018-21232

MEDIUMNVD 5.55.5—

5.5

re2c before 2.0 has uncontrolled recursion that causes stack consumption in find_fixed_tags.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 27.4%
KEV: Not listed

Published

April 29, 2020

Last Modified

November 21, 2024

References (6)

cve@mitrehttp://www.openwall.com/lists/oss-security/2020/05/14/4
cve@mitrehttps://github.com/skvadrik/re2c/issues/219
cve@mitrehttps://www.openwall.com/lists/oss-security/2020/04/27/2
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2020/05/14/4
af854a3a-2127-422b-91ae-364da2661108https://github.com/skvadrik/re2c/issues/219
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2020/04/27/2

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-674Uncontrolled Recursion

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Microsoft MSRCCVE-2018-212322022-01-19
re2c before 2.0 has uncontrolled recursion that causes stack consumption in find_fixed_tags.

Data Freshness Timeline

(refreshed 9× in last 7d / 9× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 04:05 UTCEG score recompute
2026-05-27 04:05 UTCVendor advisory
2026-05-27 04:05 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2018-21232?

CVE-2018-21232 is a medium vulnerability published on April 29, 2020. re2c before 2.0 has uncontrolled recursion that causes stack consumption in findfixedtags.

When was CVE-2018-21232 disclosed?

CVE-2018-21232 was first published in the National Vulnerability Database on April 29, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-21232 actively exploited?

CVE-2018-21232 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 27.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-21232?

CVE-2018-21232 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2018-21232?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-21232, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2018-21232

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