CVE-2022-43552

HIGHNVD 5.97.5▲
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2023-02-09. NVD baseline CVSS 5.9; sources differ by 1.6.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 2.5%CVSS: 5.9Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A use after free vulnerability exists in curl <7.87.0. Curl can be asked to *tunnel* virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.

CVSS v3
5.9
EG Score
7.5HIGHmedium confidence
EG Risk
35
EG Risk 35/100CISA 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
Severity75% × 45%
Exploitation3% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
2.5%
EPSS %ILE
84th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

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

Exploitation none (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

February 9, 2023

Last Modified

November 21, 2024

References (10)

Vendor Advisories for CVE-2022-43552(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 / EcosystemFix (by version range) / PatchReleasedSource
ubuntucurl (7.47.0-1ubuntu2.19+esm7) @ xenial2026-05-25ubuntu
ubuntucurl (7.85.0-1ubuntu0.2) @ kinetic2026-05-25ubuntu
redhatcurl-0:7.61.1-22.el8_6.122024-01-25redhat
redhatcurl-0:7.29.0-59.el7_9.22023-12-12redhat
redhatjbcs-httpd24-curl-0:8.0.1-1.el7jbcs2023-06-05redhat
redhatjbcs-httpd24-curl2023-06-05redhat
redhatcurl-0:7.61.1-30.el82023-05-16redhat
redhatcurl-0:7.76.1-23.el92023-05-09redhat

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

(16 across 16 ecosystems)
Alpine:v3.14(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • every version up to 7.79.1-r4: fixed in 7.79.1-r4
—
Alpine:v3.15(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • every version up to 7.80.0-r5: fixed in 7.80.0-r5
—
Alpine:v3.16(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • every version up to 7.83.1-r5: fixed in 7.83.1-r5
—
Alpine:v3.17(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • every version up to 7.87.0-r0: fixed in 7.87.0-r0
—
Alpine:v3.18(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • every version up to 7.87.0-r0: fixed in 7.87.0-r0
—
Alpine:v3.19(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • every version up to 7.87.0-r0: fixed in 7.87.0-r0
—
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • every version up to 7.87.0-r0: fixed in 7.87.0-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • every version up to 7.87.0-r0: fixed in 7.87.0-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • every version up to 7.87.0-r0: fixed in 7.87.0-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • every version up to 7.87.0-r0: fixed in 7.87.0-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • every version up to 7.87.0-r0: fixed in 7.87.0-r0
—
Debian:10(1)
PackageVulnerable rangeFix by version rangeDependents
curl7.64.0-4, 7.64.0-4+deb10u1, 7.64.0-4+deb10u2, 7.64.0-4+deb10u3
  • every version up to 7.64.0-4+deb10u4: fixed in 7.64.0-4+deb10u4
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
curl7.74.0-1.3, 7.74.0-1.3+deb11u1, 7.74.0-1.3+deb11u2, 7.74.0-1.3+deb11u3, 7.74.0-1.3+deb11u4
  • every version up to 7.74.0-1.3+deb11u5: fixed in 7.74.0-1.3+deb11u5
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • every version up to 7.86.0-3: fixed in 7.86.0-3
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • every version up to 7.86.0-3: fixed in 7.86.0-3
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • every version up to 7.86.0-3: fixed in 7.86.0-3
—

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 7× in last 7d / 25× 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 177 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2022-43552?
CVE-2022-43552 is a high vulnerability published on February 9, 2023. A use after free vulnerability exists in curl <7.87.0. Curl can be asked to tunnel virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a…
When was CVE-2022-43552 disclosed?
CVE-2022-43552 was first published on February 9, 2023, 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-2022-43552 actively exploited?
CVE-2022-43552 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.5% probability of exploitation in the next 30 days (84th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2022-43552?
CVE-2022-43552 has a CVSS v3 base score of 5.9 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 7.5 (HIGH).
How do I remediate CVE-2022-43552?
A fix for CVE-2022-43552 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2022-43552 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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