CVE-2023-1973

HIGHNVD 7.57.5—

7.5

A flaw was found in Undertow package. Using the FormAuthenticationMechanism, a malicious user could trigger a Denial of Service by sending crafted requests, leading the server to an OutofMemory error, exhausting the server's memory.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 72.9%
KEV: Not listed

Published

November 7, 2024

Last Modified

April 15, 2026

References (8)

secalert@redhathttps://access.redhat.com/errata/RHSA-2024:1674
secalert@redhathttps://access.redhat.com/errata/RHSA-2024:1675
secalert@redhathttps://access.redhat.com/errata/RHSA-2024:1676
secalert@redhathttps://access.redhat.com/errata/RHSA-2024:1677
secalert@redhathttps://access.redhat.com/errata/RHSA-2024:2763
secalert@redhathttps://access.redhat.com/errata/RHSA-2024:2764
secalert@redhathttps://access.redhat.com/security/cve/CVE-2023-1973
secalert@redhathttps://bugzilla.redhat.com/show_bug.cgi?id=2185662

Patch Availability(8)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
redhat	eap7-wildfly-elytron-0:1.10.17-1.Final_redhat_00001.1.el7eap	2025-06-25	redhat
redhat	eap7-xml-security-0:2.0.10-2.redhat_00002.1.ep7.el7	2025-04-28	redhat
redhat	eap8-undertow-0:2.3.11-1.SP1_redhat_00001.1.el9eap	2024-05-08	redhat
redhat	undertow-core	2024-05-08	redhat
redhat	eap7-undertow-0:2.2.30-1.SP1_redhat_00001.1.el9eap	2024-04-04	redhat
redhat	io.undertow/undertow-core:2.2.30.SP1-redhat-00001	2024-04-04	redhat
redhat	eap7-undertow-0:2.2.30-1.SP1_redhat_00001.1.el8eap	2024-04-04	redhat
redhat	eap7-undertow-0:2.2.30-1.SP1_redhat_00001.1.el7eap	2024-04-04	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)

Maven(1)

Package	Vulnerable range	Fixed in	Dependents
io.undertow:undertow-core	2.3.0.Alpha1 ... 2.3.9.Final (16 versions)	2.3.13.Final	—

Weakness Classification(1)

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

CWE-20Improper Input Validation

All Vendor Advisories

(8)

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.

Data Freshness Timeline

(refreshed 20× in last 7d / 20× 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 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-23 00:09 UTCEG score recompute
2026-05-22 21:16 UTCepss_batch
2026-05-22 21:16 UTCepss_batch
2026-05-22 21:16 UTCepss_batch
2026-05-22 21:16 UTCepss_batch
2026-05-22 21:16 UTCepss_batch
2026-05-22 21:16 UTCepss_batch
2026-05-22 21:16 UTCepss_batch
2026-05-22 21:16 UTCepss_batch
2026-05-21 22:41 UTCepss_batch
2026-05-21 22:41 UTCepss_batch
2026-05-21 22:04 UTCEG score recompute
2026-05-21 22:04 UTCVendor advisory
2026-05-20 22:37 UTCepss_batch

Frequently asked(5)

What is CVE-2023-1973?

CVE-2023-1973 is a high vulnerability published on November 7, 2024. A flaw was found in Undertow package. Using the FormAuthenticationMechanism, a malicious user could trigger a Denial of Service by sending crafted requests, leading the server to an OutofMemory error, exhausting the server's memory.

When was CVE-2023-1973 disclosed?

CVE-2023-1973 was first published in the National Vulnerability Database on November 7, 2024, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-1973 actively exploited?

CVE-2023-1973 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 72.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-1973?

CVE-2023-1973 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2023-1973?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-1973, 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-2023-1973

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CVE-2023-1973

Published

Last Modified

References (8)

Patch Availability(8)

Affected Packages

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-1973?

Same vendor

Same CWE

CVE-2023-1973

📅 Published

🔄 Last Modified

🔗 References (8)

Patch Availability(8)

Affected Packages

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-1973?

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References (8)

Frequently asked(5)

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