CVE-2023-45288

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 64.9%, top 2% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
7.5
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 92%
CISA-KEV: Not listedEPSS: 92%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

An attacker may cause an HTTP/2 endpoint to read arbitrary amounts of header data by sending an excessive number of CONTINUATION frames. Maintaining HPACK state requires parsing and processing all HEADERS and CONTINUATION frames on a connection. When a request's headers exceed MaxHeaderBytes, no memory is allocated to store the excess headers, but they are still parsed. This permits an attacker to cause an HTTP/2 endpoint to read arbitrary amounts of header data, all associated with a request which is going to be rejected. These headers can include Huffman-encoded data which is significantly more expensive for the receiver to decode than for an attacker to send. The fix sets a limit on the amount of excess header frames we will process before closing a connection.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
99.8%
KEV
Not listed

Published

April 4, 2024

Last Modified

April 15, 2026

References (17)

Vendor Advisories for CVE-2023-45288(20)

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

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatweb-terminal/web-terminal-tooling-rhel9:1.11-82025-09-15redhat
redhatopenshift-gitops-1/must-gather-rhel8:v1.14.4-12025-05-28redhat
redhatopenshift-gitops-1/must-gather-rhel8:v1.15.2-42025-05-15redhat
redhatrhceph/snmp-notifier-rhel9:1.2.1-982025-04-28redhat
redhatopenshift4/ose-openshift-apiserver-rhel8:v4.12.0-202501270458.p0.gb0407e3.assembly.stream.el82025-02-06redhat
redhatcert-manager/jetstack-cert-manager-rhel9:v1.15.42025-01-21redhat
redhatopenshift4/ose-kube-rbac-proxy:v4.12.0-202410182029.p0.gc69fae7.assembly.stream.el82024-11-07redhat
redhatopenshift4/ose-kube-rbac-proxy:v4.13.0-202410190100.p0.gf35f954.assembly.stream.el82024-11-06redhat
redhatopenshift4/ose-kube-rbac-proxy:v4.15.0-202410230304.p0.g9308e7f.assembly.stream.el82024-10-31redhat
redhatopenshift4/ose-kube-rbac-proxy:v4.14.0-202410091239.p0.gb8b8259.assembly.stream.el82024-10-23redhat
redhatrhmtc/openshift-migration-controller-rhel8:v1.8.4-222024-09-26redhat
redhatopenshift4/ose-openshift-apiserver-rhel8:v4.13.0-202409020337.p0.g3a7ac1b.assembly.stream.el82024-09-25redhat
redhatopenshift4/ose-oauth-apiserver-rhel8:v4.12.0-202409101431.p0.g1053f14.assembly.stream.el82024-09-18redhat
redhatopenshift4/ose-openshift-apiserver-rhel8:v4.14.0-202408260910.p0.g433fd32.assembly.stream.el82024-09-11redhat
redhatopenshift4/ose-oauth-apiserver-rhel8:v4.13.0-202408281337.p0.g6a59716.assembly.stream.el82024-09-04redhat
redhatopenshift-builds-operator-container2024-09-03redhat
redhatopenshift4/ose-cluster-baremetal-operator-rhel9:v4.16.0-202408262007.p0.g8f65ef6.assembly.stream.el92024-09-03redhat
redhatopenshift4/ose-oauth-apiserver-rhel8:v4.14.0-202407250240.p0.ge1cd9d0.assembly.stream.el82024-08-07redhat
redhatopenshift-builds/openshift-builds-rhel9-operator:1.1.02024-08-05redhat
redhatoadp/oadp-rhel9-operator:1.3.3-122024-08-01redhat
redhatgit-lfs-0:2.11.0-2.el8_4.22024-07-31redhat
redhatgit-lfs-0:3.2.0-1.el9_22024-07-31redhat
redhatopenshift4/ose-openshift-apiserver-rhel9:v4.15.0-202407151306.p0.g08f4c42.assembly.stream.el92024-07-25redhat
redhatopenshift4/ose-operator-registry:v4.12.0-202407151105.p0.g3327393.assembly.stream.el82024-07-25redhat
redhatdevspaces/devspaces-rhel8-operator:3.15-102024-07-18redhat
redhatopenshift4/ose-operator-registry:v4.13.0-202407081338.p0.gd8cfe86.assembly.stream.el82024-07-17redhat
redhatgit-lfs-0:2.13.3-3.el8_6.12024-07-15redhat
redhatgit-lfs-0:2.13.3-5.el9_0.12024-07-15redhat
redhatgit-lfs-0:3.2.0-2.el8_8.12024-07-15redhat
redhatrhacm2/acm-cluster-permission-rhel9:v2.10.4-62024-07-10redhat

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 1 ecosystem)
Go(4)
PackageVulnerable rangeFixed inDependents
golang.org/x/net—0.23.0—
golang.org/x/net/http2—0.23.0—
net/http—1.22.2—
stdlib—1.22.2—

All Vendor Advisories

(25)

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 8× in last 7d / 19× 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.

  1. 2026-07-22 14:06 UTCEPSS rescore
  2. 2026-07-21 15:23 UTCEPSS rescore
  3. 2026-07-21 15:23 UTCEPSS rescore
  4. 2026-07-20 17:06 UTCEPSS rescore
  5. 2026-07-18 10:03 UTCEPSS rescore
  6. 2026-07-18 10:03 UTCEPSS rescore
  7. 2026-07-16 17:01 UTCEPSS rescore
  8. 2026-07-16 17:01 UTCEPSS rescore
  9. 2026-07-11 08:22 UTCOSV refresh
  10. 2026-07-08 15:13 UTCEPSS rescore
  11. 2026-06-30 23:21 UTCEPSS rescore
  12. 2026-06-30 23:21 UTCEPSS rescore
  13. 2026-06-29 14:05 UTCEPSS rescore
  14. 2026-06-28 14:06 UTCEPSS rescore
  15. 2026-06-28 14:06 UTCEPSS rescore
  16. 2026-06-24 14:04 UTCEPSS rescore
  17. 2026-06-24 14:04 UTCEPSS rescore
  18. 2026-06-23 21:31 UTCEPSS rescore
  19. 2026-06-23 21:31 UTCEPSS rescore
  20. 2026-06-22 14:56 UTCOSV refresh
  21. 2026-06-15 17:47 UTCEPSS rescore
  22. 2026-06-15 17:47 UTCEPSS rescore
  23. 2026-06-14 23:16 UTCEPSS rescore
  24. 2026-06-12 23:10 UTCEPSS rescore
  25. 2026-06-12 23:10 UTCEPSS rescore
Show 47 more
  1. 2026-06-11 13:59 UTCEPSS rescore
  2. 2026-06-11 13:59 UTCEPSS rescore
  3. 2026-06-10 22:17 UTCEPSS rescore
  4. 2026-06-10 13:21 UTCEPSS rescore
  5. 2026-06-10 13:21 UTCEPSS rescore
  6. 2026-06-05 22:46 UTCEPSS rescore
  7. 2026-06-05 22:46 UTCEPSS rescore
  8. 2026-06-05 06:09 UTCEPSS rescore
  9. 2026-06-05 06:09 UTCEPSS rescore
  10. 2026-06-05 06:09 UTCEPSS rescore
  11. 2026-06-05 00:39 UTCOSV refresh
  12. 2026-06-04 13:11 UTCEPSS rescore
  13. 2026-06-04 13:11 UTCEPSS rescore
  14. 2026-06-01 13:51 UTCEPSS rescore
  15. 2026-06-01 13:51 UTCEPSS rescore
  16. 2026-05-29 13:43 UTCEPSS rescore
  17. 2026-05-29 13:43 UTCEPSS rescore
  18. 2026-05-27 13:39 UTCEPSS rescore
  19. 2026-05-27 13:39 UTCEPSS rescore
  20. 2026-05-26 13:43 UTCEPSS rescore
  21. 2026-05-26 13:43 UTCEPSS rescore
  22. 2026-05-22 21:16 UTCEPSS rescore
  23. 2026-05-22 21:16 UTCEPSS rescore
  24. 2026-05-22 21:16 UTCEPSS rescore
  25. 2026-05-22 21:16 UTCEPSS rescore
  26. 2026-05-22 21:16 UTCEPSS rescore
  27. 2026-05-22 21:16 UTCEPSS rescore
  28. 2026-05-22 03:34 UTCEG score recompute
  29. 2026-05-22 03:34 UTCVendor advisory
  30. 2026-05-21 22:41 UTCEPSS rescore
  31. 2026-05-21 22:41 UTCEPSS rescore
  32. 2026-05-20 22:37 UTCEPSS rescore
  33. 2026-05-20 22:37 UTCEPSS rescore
  34. 2026-05-20 22:37 UTCEPSS rescore
  35. 2026-05-20 22:37 UTCEPSS rescore
  36. 2026-05-20 22:37 UTCEPSS rescore
  37. 2026-05-20 22:37 UTCEPSS rescore
  38. 2026-05-20 11:21 UTCEPSS rescore
  39. 2026-05-20 11:21 UTCEPSS rescore
  40. 2026-05-20 11:21 UTCEPSS rescore
  41. 2026-05-20 11:21 UTCEPSS rescore
  42. 2026-05-20 11:21 UTCEPSS rescore
  43. 2026-05-20 11:21 UTCEPSS rescore
  44. 2026-05-18 21:30 UTCEPSS rescore
  45. 2026-05-18 21:30 UTCEPSS rescore
  46. 2026-05-18 21:30 UTCEPSS rescore
  47. 2026-05-18 21:30 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoChex0punk/cont-flood-poc
    First seen Apr 12, 2024

    PoC for CVE-2023-45288, continuation flood vulnerability

    Open source ↗

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2023-45288?
CVE-2023-45288 is a high vulnerability published on April 4, 2024. An attacker may cause an HTTP/2 endpoint to read arbitrary amounts of header data by sending an excessive number of CONTINUATION frames. Maintaining HPACK state requires parsing and processing all HEADERS and CONTINUATION frames on a connection. When a request's headers exceed MaxHeaderBytes, no…
When was CVE-2023-45288 disclosed?
CVE-2023-45288 was first published in the National Vulnerability Database on April 4, 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-2023-45288 actively exploited?
CVE-2023-45288 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-45288?
CVE-2023-45288 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2023-45288?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-45288, 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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