CVE-2023-0056

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2023-03-23. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 6.5Exploit: None knownExposed: 0

A fix is available — apply it.

An uncontrolled resource consumption vulnerability was discovered in HAProxy which could crash the service. This issue could allow an authenticated remote attacker to run a specially crafted malicious server in an OpenShift cluster. The biggest impact is to availability.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
30(Track)
EG Risk 30/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation2% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
77%
KEV
Not listed

Published

March 23, 2023

Last Modified

February 25, 2025

References (2)

Vendor Advisories for CVE-2023-0056(3)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuvim-haproxy (2.0.29-0ubuntu1.1) @ focal2026-05-25ubuntu
redhatrhceph/rhceph-haproxy-rhel8:2.2.19-322024-02-08redhat
redhathaproxy-0:2.2.24-3.rhaos4.13.el82023-05-18redhat
redhathaproxy-0:2.4.7-2.el9_0.22023-04-25redhat
redhathaproxy-0:2.4.17-3.el9_1.22023-04-11redhat
redhathaproxy-0:2.2.15-6.el82023-03-27redhat
redhathaproxy-0:2.2.19-3.el82023-03-01redhat
redhathaproxy-0:2.2.24-2.el82023-02-21redhat

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
haproxy2.2.9-2 ... 2.2.9-2+deb11u3~bpo10+1 (7 versions)2.2.9-2+deb11u4—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
haproxy—2.6.8-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
haproxy—2.6.8-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
haproxy—2.6.8-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(6)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 5× in last 7d / 27× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 136 total refreshes for this CVE.

  1. 2026-08-25 13:46 UTCEPSS rescore
  2. 2026-08-23 00:17 UTCEPSS rescore
  3. 2026-08-21 23:46 UTCEPSS rescore
  4. 2026-08-20 22:53 UTCEPSS rescore
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  7. 2026-08-17 23:30 UTCOSV refresh
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  21. 2026-08-02 18:27 UTCOSV refresh
  22. 2026-08-02 02:24 UTCEPSS rescore
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  25. 2026-07-30 16:25 UTCEPSS rescore
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  9. 2026-07-23 02:17 UTCEG score recompute
  10. 2026-07-22 23:04 UTCEG score recompute
  11. 2026-07-22 14:06 UTCEPSS rescore
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  22. 2026-07-16 17:00 UTCEPSS rescore
  23. 2026-07-16 02:23 UTCOSV refresh
  24. 2026-07-15 16:56 UTCEPSS rescore
  25. 2026-07-15 16:56 UTCEPSS rescore
  26. 2026-07-15 01:58 UTCEPSS rescore
  27. 2026-07-15 01:58 UTCEPSS rescore
  28. 2026-07-13 22:28 UTCEPSS rescore
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  42. 2026-07-01 15:04 UTCEPSS rescore
  43. 2026-06-30 23:21 UTCEPSS rescore
  44. 2026-06-30 23:20 UTCEPSS rescore
  45. 2026-06-28 04:54 UTCEPSS rescore
  46. 2026-06-28 04:54 UTCEPSS rescore
  47. 2026-06-28 02:34 UTCOSV refresh
  48. 2026-06-27 03:07 UTCEPSS rescore
  49. 2026-06-27 03:07 UTCEPSS rescore
  50. 2026-06-25 13:48 UTCEPSS rescore
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  54. 2026-06-23 21:31 UTCEPSS rescore
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  74. 2026-06-11 13:58 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2023-0056?
CVE-2023-0056 is a medium vulnerability published on March 23, 2023. An uncontrolled resource consumption vulnerability was discovered in HAProxy which could crash the service. This issue could allow an authenticated remote attacker to run a specially crafted malicious server in an OpenShift cluster. The biggest impact is to availability.
When was CVE-2023-0056 disclosed?
CVE-2023-0056 was first published in the National Vulnerability Database on March 23, 2023, with the most recent update on February 25, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-0056 actively exploited?
CVE-2023-0056 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 22.7% of all scored CVEs.
What is the CVSS score of CVE-2023-0056?
CVE-2023-0056 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2023-0056?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-0056, 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

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