CVE-2022-36937

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2023-05-10. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.8Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

HHVM 4.172.0 and all prior versions use TLS 1.0 for secure connections when handling tls:// URLs in the stream extension. TLS1.0 has numerous published vulnerabilities and is deprecated. HHVM 4.153.4, 4.168.2, 4.169.2, 4.170.2, 4.171.1, 4.172.1, 4.173.0 replaces TLS1.0 with TLS1.3.

Applications that call stream_socket_server or stream_socket_client functions with a URL starting with tls:// are affected.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
59
EG Risk 59/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high until it ships, then apply the release.
EPSS PROB
0.5%
EPSS %ILE
43rd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-22). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high until it ships, then apply the release.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 10, 2023

Last Modified

January 27, 2025

Advisory Details (2)

Auto-updated Oct 10, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
Web page

CVE-2022-36937: TLS 1.0 connections | HHVM

https://hhvm.com/blog/2023/01/20/security-update.html
GitHub commit

commit 083f5ffdee66 (facebook/hhvm)

Fix landed in facebook/hhvm commit 083f5ffdee66 — awaiting tagged release

https://github.com/facebook/hhvm/commit/083f5ffdee661f61512909d16f9a5b98cff3cf0b

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 53× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 97 of 221 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 3 repeat rows among the latest 100 are merged into the row they repeat. The 124 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-23 16:28 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  2. 2026-10-23 11:06 UTCEG score recompute
  3. 2026-10-23 11:06 UTCGHSA enrichmentGHSA-f3qf-gc58-29p6 · GitHub severity CRITICAL · GitHub CVSS 9.8
  4. 2026-10-22 16:30 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  5. 2026-10-22 13:12 UTCEG score recompute
  6. 2026-10-22 13:12 UTCGHSA enrichmentGHSA-f3qf-gc58-29p6 · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-10-21 16:29 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  8. 2026-10-21 15:08 UTCGHSA enrichmentGHSA-f3qf-gc58-29p6 · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-10-20 17:13 UTCEG score recompute
  10. 2026-10-20 17:13 UTCGHSA enrichmentGHSA-f3qf-gc58-29p6 · GitHub severity CRITICAL · GitHub CVSS 9.8
  11. 2026-10-20 16:29 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  12. 2026-10-19 19:16 UTCEG score recompute
  13. 2026-10-19 19:16 UTCGHSA enrichmentGHSA-f3qf-gc58-29p6 · GitHub severity CRITICAL · GitHub CVSS 9.8
  14. 2026-10-19 16:28 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  15. 2026-10-18 21:21 UTCEG score recompute
  16. 2026-10-18 21:20 UTCGHSA enrichmentGHSA-f3qf-gc58-29p6 · GitHub severity CRITICAL · GitHub CVSS 9.8
  17. 2026-10-18 16:28 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  18. 2026-10-18 08:30 UTCEG score recompute
  19. 2026-10-17 22:55 UTCEG score recompute
  20. 2026-10-17 22:54 UTCGHSA enrichmentGHSA-f3qf-gc58-29p6 · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-10-17 16:29 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  22. 2026-10-17 01:00 UTCEG score recompute
  23. 2026-10-17 00:59 UTCGHSA enrichmentGHSA-f3qf-gc58-29p6 · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-10-16 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  25. 2026-10-16 01:03 UTCEG score recompute
Show 72 more
  1. 2026-10-16 01:03 UTCGHSA enrichmentGHSA-f3qf-gc58-29p6 · GitHub severity CRITICAL · GitHub CVSS 9.8
  2. 2026-10-15 16:28 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  3. 2026-10-14 20:04 UTCEG score recompute
  4. 2026-10-14 20:03 UTCGHSA enrichmentGHSA-f3qf-gc58-29p6 · GitHub severity CRITICAL · GitHub CVSS 9.8
  5. 2026-10-14 16:29 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  6. 2026-10-13 16:29 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  7. 2026-10-13 16:13 UTCGHSA enrichmentGHSA-f3qf-gc58-29p6 · GitHub severity CRITICAL · GitHub CVSS 9.8
  8. 2026-10-12 18:16 UTCEG score recompute
  9. 2026-10-12 18:16 UTCGHSA enrichmentGHSA-f3qf-gc58-29p6 · GitHub severity CRITICAL · GitHub CVSS 9.8
  10. 2026-10-12 16:30 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  11. 2026-10-11 23:14 UTCEG score recompute
  12. 2026-10-11 13:44 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  13. 2026-10-10 19:56 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  14. 2026-10-09 20:04 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  15. 2026-10-08 16:40 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  16. 2026-10-07 23:45 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  17. 2026-10-06 15:14 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  18. 2026-10-05 17:40 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  19. 2026-10-04 23:19 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  20. 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  21. 2026-10-02 16:23 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  22. 2026-10-01 19:47 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  23. 2026-09-30 16:01 UTCEG score recompute
  24. 2026-09-30 15:00 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  25. 2026-09-29 15:16 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  26. 2026-09-27 13:42 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  27. 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  28. 2026-09-24 14:00 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  29. 2026-09-23 11:53 UTCOSV refresh
  30. 2026-09-22 14:45 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  31. 2026-09-20 20:13 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  32. 2026-09-19 15:38 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  33. 2026-09-17 19:24 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  34. 2026-09-16 14:05 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  35. 2026-09-15 03:07 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  36. 2026-09-12 14:57 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  37. 2026-09-11 14:50 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  38. 2026-09-11 09:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  39. 2026-09-08 21:57 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  40. 2026-09-07 15:58 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  41. 2026-09-06 13:45 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  42. 2026-09-05 15:25 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  43. 2026-09-04 13:57 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  44. 2026-09-04 06:46 UTCOSV refresh
  45. 2026-09-04 05:04 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  46. 2026-09-02 14:09 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  47. 2026-09-01 13:51 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  48. 2026-08-30 19:14 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  49. 2026-08-30 01:19 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  50. 2026-08-28 21:38 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  51. 2026-08-27 14:22 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  52. 2026-08-26 14:43 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  53. 2026-08-25 13:46 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  54. 2026-08-24 14:13 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  55. 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  56. 2026-08-21 23:46 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  57. 2026-08-20 22:52 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  58. 2026-08-19 17:01 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  59. 2026-08-18 13:45 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  60. 2026-08-17 17:29 UTCOSV refresh
  61. 2026-08-17 13:44 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  62. 2026-08-16 14:53 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  63. 2026-08-16 02:11 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  64. 2026-08-15 01:27 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  65. 2026-08-13 21:58 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  66. 2026-08-12 13:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  67. 2026-08-11 13:39 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  68. 2026-08-10 14:08 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  69. 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  70. 2026-08-08 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  71. 2026-08-07 16:24 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  72. 2026-08-06 13:44 UTCEPSS rescoreEPSS 0.5% · 41st percentile

Frequently asked(5)

What is CVE-2022-36937?
CVE-2022-36937 is a critical-severity vulnerability; its CVE record was published on May 10, 2023. HHVM 4.172.0 and all prior versions use TLS 1.0 for secure connections when handling tls:// URLs in the stream extension. TLS1.0 has numerous published vulnerabilities and is deprecated. HHVM 4.153.4, 4.168.2, 4.169.2, 4.170.2, 4.171.1, 4.172.1, 4.173.0 replaces TLS1.0 with TLS1.3. Applications…
When was the CVE record for CVE-2022-36937 published?
The CVE record for CVE-2022-36937 was published on May 10, 2023. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of January 27, 2025; the record at its source may have been updated since.
Is CVE-2022-36937 actively exploited?
CVE-2022-36937 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (43rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2022-36937?
CVE-2022-36937 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2022-36937?
An upstream fix for CVE-2022-36937 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2022-36937

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