CVE-2021-22922

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 4.3%CVSS: 6.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

When curl is instructed to download content using the metalink feature, thecontents is verified against a hash provided in the metalink XML file.The metalink XML file points out to the client how to get the same contentfrom a set of different URLs, potentially hosted by different servers and theclient can then download the file from one or several of them. In a serial orparallel manner.If one of the servers hosting the contents has been breached and the contentsof the specific file on that server is replaced with a modified payload, curlshould detect this when the hash of the file mismatches after a completeddownload. It should remove the contents and instead try getting the contentsfrom another URL. This is not done, and instead such a hash mismatch is onlymentioned in text and the potentially malicious content is kept in the file ondisk.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
45
EG Risk 45/100CISA SSVC

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%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
4.3%
EPSS %ILE
90th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 5, 2021

Last Modified

April 16, 2026

References (20)

Vendor Advisories for CVE-2021-22922(1)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatcurl-0:7.61.1-12.el8_2.32021-10-19redhat
redhatcurl-0:7.61.1-18.el8_4.12021-09-21redhat

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

(17 across 17 ecosystems)
Alpine:v3.12(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.27.0 up to 7.78.0-r0: fixed in 7.78.0-r0
—
Alpine:v3.13(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.27.0 up to 7.78.0-r0: fixed in 7.78.0-r0
—
Alpine:v3.14(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.27.0 up to 7.78.0-r0: fixed in 7.78.0-r0
—
Alpine:v3.15(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.27.0 up to 7.78.0-r0: fixed in 7.78.0-r0
—
Alpine:v3.16(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.27.0 up to 7.78.0-r0: fixed in 7.78.0-r0
—
Alpine:v3.17(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.27.0 up to 7.78.0-r0: fixed in 7.78.0-r0
—
Alpine:v3.18(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.27.0 up to 7.78.0-r0: fixed in 7.78.0-r0
—
Alpine:v3.19(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.27.0 up to 7.78.0-r0: fixed in 7.78.0-r0
—
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.27.0 up to 7.78.0-r0: fixed in 7.78.0-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.27.0 up to 7.78.0-r0: fixed in 7.78.0-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.27.0 up to 7.78.0-r0: fixed in 7.78.0-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.27.0 up to 7.78.0-r0: fixed in 7.78.0-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.27.0 up to 7.78.0-r0: fixed in 7.78.0-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
curl7.74.0-1.3 ... 8.9.1-2~bpo12+1 (219 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • every version up to 7.79.1-1: fixed in 7.79.1-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • every version up to 7.79.1-1: fixed in 7.79.1-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • every version up to 7.79.1-1: fixed in 7.79.1-1
—

Weakness Classification(2)

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

Additional Vendor Advisories

(2)

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 8× in last 7d / 32× 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 224 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

Same vendor

2 shown

redhat:RHSA-2021:3582

Frequently asked(5)

What is CVE-2021-22922?
CVE-2021-22922 is a medium vulnerability published on August 5, 2021. When curl is instructed to download content using the metalink feature, thecontents is verified against a hash provided in the metalink XML file.The metalink XML file points out to the client how to get the same contentfrom a set of different URLs, potentially hosted by different servers and…
When was CVE-2021-22922 disclosed?
CVE-2021-22922 was first published on August 5, 2021, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-22922 actively exploited?
CVE-2021-22922 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.3% probability of exploitation in the next 30 days (90th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2021-22922?
CVE-2021-22922 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2021-22922?
A fix for CVE-2021-22922 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2021-22922 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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