CVE-2022-22721

CRITICALNVD 9.19.8▲
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-03-15. NVD baseline CVSS 9.1; sources differ by 0.7.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 42%CVSS: 9.1Exploit: Elevated riskExposed: 0

A fix is available — apply it.

If LimitXMLRequestBody is set to allow request bodies larger than 350MB (defaults to 1M) on 32 bit systems an integer overflow happens which later causes out of bounds writes. This issue affects Apache HTTP Server 2.4.52 and earlier.

CVSS v3
9.1
EG Score
9.8(medium)
EG Risk
65(Track*)
EG Risk 65/100SSVC: 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
Severity98% × 45%
Exploitation42% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
42%
EPSS %ILE
99%
KEV
Not listed

Published

March 14, 2022

Last Modified

November 21, 2024

Advisory Details (10)

Auto-updated Jul 22, 2026
⚠️ Active exploitation confirmed. Patch available.
generic

Apache HTTPD: Multiple Vulnerabilities (GLSA 202208-20) — Gentoo security

https://security.gentoo.org/glsa/202208-20
generic

[SECURITY] Fedora 34 Update: httpd-2.4.53-1.fc34 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7H26WJ6TPKNWV3QKY4BHKUKQVUTZJTD/
generic

[SECURITY] Fedora 36 Update: httpd-2.4.53-1.fc36 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X73C35MMMZGBVPQQCH7LQZUMYZNQA5FO/
generic

[SECURITY] Fedora 35 Update: httpd-2.4.53-1.fc35 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGWILBORT67SHMSLYSQZG2NMXGCMPUZO/
generic Patch Available

[SECURITY] [DLA 2960-1] apache2 security update

https://lists.debian.org/debian-lts-announce/2022/03/msg00033.html
generic Patch Available🔴 Active Exploitation

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

https://httpd.apache.org/security/vulnerabilities_24.html
generic

oss-security - CVE-2022-22721: Apache HTTP Server: core: Possible buffer overflow with very large or unlimited LimitXMLRequestBody

http://www.openwall.com/lists/oss-security/2022/03/14/2
generic

Full Disclosure: APPLE-SA-2022-05-16-2 macOS Monterey 12.4

http://seclists.org/fulldisclosure/2022/May/38
generic🔴 Active Exploitation

Full Disclosure: APPLE-SA-2022-05-16-3 macOS Big Sur 11.6.6

http://seclists.org/fulldisclosure/2022/May/35
generic

Full Disclosure: APPLE-SA-2022-05-16-4 Security Update 2022-004 Catalina

http://seclists.org/fulldisclosure/2022/May/33

Vendor Advisories for CVE-2022-22721(3)

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

Patch Availability(7)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuapache2-bin (2.4.48-3.1ubuntu3.3) @ impish2026-05-26ubuntu
ubuntuapache2-bin (2.4.18-2ubuntu3.17+esm5) @ xenial2026-05-26ubuntu
redhatjbcs-httpd24-httpd2022-12-08redhat
redhatjbcs-httpd24-httpd-0:2.4.51-37.el7jbcs2022-12-08redhat
redhathttpd-0:2.4.53-7.el92022-11-15redhat
redhathttpd:2.4-8070020220725152258.3b9f49c42022-11-08redhat
redhathttpd24-httpd-0:2.4.34-23.el7.52022-09-29redhat

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

(18 across 18 ecosystems)
Alpine:v3.12(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.53-r0—
Alpine:v3.13(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.53-r0—
Alpine:v3.14(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.53-r0—
Alpine:v3.15(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.53-r0—
Alpine:v3.16(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.53-r0—
Alpine:v3.17(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.53-r0—
Alpine:v3.18(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.53-r0—
Alpine:v3.19(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.53-r0—
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.53-r0—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.53-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.53-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.53-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.53-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
apache22.4.48-3.1 ... 2.4.52-3 (24 versions)2.4.53-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.53-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.53-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
apache2—2.4.53-1—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
apache22.4.25-3 ... 2.4.25-3+deb9u9 (13 versions)2.4.25-3+deb9u13—

Weakness Classification(1)

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

Additional Vendor Advisories

(5)

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 6× in last 7d / 26× 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 130 total refreshes for this CVE.

  1. 2026-09-06 13:45 UTCEPSS rescore
  2. 2026-09-05 19:25 UTCOSV refresh
  3. 2026-09-05 15:25 UTCEPSS rescore
  4. 2026-09-04 13:57 UTCEPSS rescore
  5. 2026-09-04 05:04 UTCEPSS rescore
  6. 2026-09-02 14:09 UTCEPSS rescore
  7. 2026-09-01 13:51 UTCEPSS rescore
  8. 2026-08-30 19:14 UTCEPSS rescore
  9. 2026-08-30 01:19 UTCEPSS rescore
  10. 2026-08-28 21:38 UTCEPSS rescore
  11. 2026-08-27 14:22 UTCEPSS rescore
  12. 2026-08-26 14:43 UTCEPSS rescore
  13. 2026-08-25 13:46 UTCEPSS rescore
  14. 2026-08-25 13:46 UTCEPSS rescore
  15. 2026-08-24 14:13 UTCEPSS rescore
  16. 2026-08-21 23:46 UTCEPSS rescore
  17. 2026-08-20 22:52 UTCEPSS rescore
  18. 2026-08-19 17:01 UTCEPSS rescore
  19. 2026-08-19 06:29 UTCOSV refresh
  20. 2026-08-18 13:45 UTCEPSS rescore
  21. 2026-08-17 13:44 UTCEPSS rescore
  22. 2026-08-16 14:53 UTCEPSS rescore
  23. 2026-08-16 02:11 UTCEPSS rescore
  24. 2026-08-15 01:27 UTCEPSS rescore
  25. 2026-08-13 21:57 UTCEPSS rescore
Show 75 more
  1. 2026-08-12 13:48 UTCEPSS rescore
  2. 2026-08-08 16:34 UTCEPSS rescore
  3. 2026-08-07 16:24 UTCEPSS rescore
  4. 2026-08-06 13:44 UTCEPSS rescore
  5. 2026-08-05 19:15 UTCEPSS rescore
  6. 2026-08-04 10:34 UTCEPSS rescore
  7. 2026-08-04 01:57 UTCOSV refresh
  8. 2026-08-02 02:24 UTCEPSS rescore
  9. 2026-08-01 04:13 UTCEPSS rescore
  10. 2026-07-30 16:25 UTCEPSS rescore
  11. 2026-07-30 01:28 UTCEPSS rescore
  12. 2026-07-28 15:33 UTCEPSS rescore
  13. 2026-07-26 14:52 UTCEPSS rescore
  14. 2026-07-26 14:52 UTCEPSS rescore
  15. 2026-07-25 14:15 UTCEPSS rescore
  16. 2026-07-24 14:15 UTCEPSS rescore
  17. 2026-07-23 14:16 UTCEPSS rescore
  18. 2026-07-23 02:08 UTCEG score recompute
  19. 2026-07-22 22:55 UTCEG score recompute
  20. 2026-07-22 14:06 UTCEPSS rescore
  21. 2026-07-22 14:06 UTCEPSS rescore
  22. 2026-07-20 17:05 UTCEPSS rescore
  23. 2026-07-19 02:27 UTCEPSS rescore
  24. 2026-07-18 10:02 UTCEPSS rescore
  25. 2026-07-18 10:02 UTCEPSS rescore
  26. 2026-07-17 20:59 UTCOSV refresh
  27. 2026-07-16 17:00 UTCEPSS rescore
  28. 2026-07-16 17:00 UTCEPSS rescore
  29. 2026-07-15 16:56 UTCEPSS rescore
  30. 2026-07-15 16:56 UTCEPSS rescore
  31. 2026-07-15 01:58 UTCEPSS rescore
  32. 2026-07-15 01:58 UTCEPSS rescore
  33. 2026-07-13 22:27 UTCEPSS rescore
  34. 2026-07-13 06:11 UTCEPSS rescore
  35. 2026-07-13 06:11 UTCEPSS rescore
  36. 2026-07-12 05:44 UTCEPSS rescore
  37. 2026-07-11 08:25 UTCEPSS rescore
  38. 2026-07-09 19:07 UTCEPSS rescore
  39. 2026-07-08 15:12 UTCEPSS rescore
  40. 2026-07-06 02:21 UTCEPSS rescore
  41. 2026-07-04 06:29 UTCEPSS rescore
  42. 2026-07-04 06:29 UTCEPSS rescore
  43. 2026-07-01 15:04 UTCEPSS rescore
  44. 2026-06-29 18:53 UTCOSV refresh
  45. 2026-06-28 04:54 UTCEPSS rescore
  46. 2026-06-28 04:54 UTCEPSS rescore
  47. 2026-06-27 03:07 UTCEPSS rescore
  48. 2026-06-25 13:48 UTCEPSS rescore
  49. 2026-06-24 14:03 UTCEPSS rescore
  50. 2026-06-24 14:03 UTCEPSS rescore
  51. 2026-06-23 21:31 UTCEPSS rescore
  52. 2026-06-23 21:31 UTCEPSS rescore
  53. 2026-06-21 01:58 UTCEPSS rescore
  54. 2026-06-21 01:58 UTCEPSS rescore
  55. 2026-06-19 19:24 UTCEPSS rescore
  56. 2026-06-19 19:24 UTCEPSS rescore
  57. 2026-06-18 17:51 UTCEPSS rescore
  58. 2026-06-18 17:51 UTCEPSS rescore
  59. 2026-06-17 17:51 UTCEPSS rescore
  60. 2026-06-17 17:51 UTCEPSS rescore
  61. 2026-06-16 17:51 UTCEPSS rescore
  62. 2026-06-15 17:46 UTCEPSS rescore
  63. 2026-06-14 23:15 UTCEPSS rescore
  64. 2026-06-14 23:15 UTCEPSS rescore
  65. 2026-06-13 22:58 UTCEPSS rescore
  66. 2026-06-13 22:58 UTCEPSS rescore
  67. 2026-06-12 23:10 UTCEPSS rescore
  68. 2026-06-12 23:10 UTCEPSS rescore
  69. 2026-06-12 07:06 UTCOSV refresh
  70. 2026-06-11 13:58 UTCEPSS rescore
  71. 2026-06-11 13:58 UTCEPSS rescore
  72. 2026-06-10 22:16 UTCEPSS rescore
  73. 2026-06-10 13:20 UTCEPSS rescore
  74. 2026-06-08 14:15 UTCEPSS rescore
  75. 2026-06-08 14:15 UTCEPSS rescore

Frequently asked(5)

What is CVE-2022-22721?
CVE-2022-22721 is a critical vulnerability published on March 14, 2022. If LimitXMLRequestBody is set to allow request bodies larger than 350MB (defaults to 1M) on 32 bit systems an integer overflow happens which later causes out of bounds writes. This issue affects Apache HTTP Server 2.4.52 and earlier.
When was CVE-2022-22721 disclosed?
CVE-2022-22721 was first published in the National Vulnerability Database on March 14, 2022, 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-2022-22721 actively exploited?
CVE-2022-22721 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 42% probability of exploitation in the next 30 days, which ranks it in the top 1.4% of all scored CVEs.
What is the CVSS score of CVE-2022-22721?
CVE-2022-22721 has a CVSS v3 base score of 9.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.8.
How do I remediate CVE-2022-22721?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-22721, 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-2022-22721

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