CVE-2024-49768

CRITICALNVD 9.19.1
EchelonGraph scoreMEDIUM confidence

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

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2024-10-29. NVD baseline CVSS 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3

Also known asEUVD-2024-0187 (ENISA EUVD) · GHSA-9298-4cf8-g4wj (GitHub Security Advisories) · PYSEC-2024-210 (OSV.dev)Source: ENISA EUVD

9.1EG
EchelonGraph verdictPlan a fixRemediate 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: 9.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Waitress is a Web Server Gateway Interface server for Python 2 and 3. A remote client may send a request that is exactly recv_bytes (defaults to 8192) long, followed by a secondary request using HTTP pipelining. When request lookahead is disabled (default) we won't read any more requests, and when the first request fails due to a parsing error, we simply close the connection. However when request lookahead is enabled, it is possible to process and receive the first request, start sending the error message back to the client while we read the next request and queue it. This will allow the secondary request to be serviced by the worker thread while the connection should be closed. Waitress 3.0.1 fixes the race condition. As a workaround, disable channel_request_lookahead, this is set to 0 by default disabling this feature.

CVSS v3
9.1
EG Score
9.1CRITICALmedium confidence
EG Risk
56
EG Risk 56/100

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)
Severity91% × 45%
Impact severity (EG Severity): CVSS 9.1 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: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
42nd
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 (9.1): severity, escalated by confirmed exploitation. This CVE's 9.1 is its impact severity (EG Severity), not escalated.

EG Severity
9.1 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 2026-11-12). 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, and whom BOD 26-04 binds: 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).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

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.

The score's inputs: 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

October 29, 2024

Last Modified

November 7, 2024

Advisory Details (2)

Auto-updated Jul 21, 2026
Patch available. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)

Request processing race condition in HTTP pipelining with invalid first request · Advisory · Pylons/waitress · GitHub

https://github.com/Pylons/waitress/security/advisories/GHSA-9298-4cf8-g4wj
GitHub commit Patch Available

commit e4359018537a (Pylons/waitress)

Patch available: Pylons/waitress v3.0.1 (contains commit e4359018537a)

https://github.com/Pylons/waitress/commit/e4359018537af376cf24bd13616d861e2fb76f65

Vendor Advisories for CVE-2024-49768(1)

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

Patch Availability(5)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntupython3-waitress (1.4.1-1ubuntu0.2) @ focal2026-11-02ubuntu
redhatpython-waitress-0:2.0.0-4.el9ost2025-02-10redhat
redhatpython-waitress-0:2.0.0-4.el8ost2025-02-10redhat
redhatpython-waitress-0:3.0.1-1.el92024-12-12redhat
pipwaitress @ 3.0.1 (fixes >= 2.0.0, < 3.0.1)—ghsa

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 4 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
waitress2.1.2-2
  • every version up to 2.1.2-2+deb12u1: fixed in 2.1.2-2+deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
waitress—
  • every version up to 3.0.1-1: fixed in 3.0.1-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
waitress—
  • every version up to 3.0.1-1: fixed in 3.0.1-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
waitress2.0.0 ... 3.0.0 (6 versions)
  • 2.0.0 up to 3.0.1: fixed in 3.0.1
—

Weakness Classification(2)

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

All Vendor Advisories

(10)

Data Freshness Timeline

(refreshed 21× in last 7d / 72× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 298 rows 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. None are among the latest 100 rows. The 198 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 04:55 UTCEchelonGraph re-scored
  2. 2026-11-13 04:55 UTCVendor advisory
  3. 2026-11-13 04:55 UTCGHSA enrichmentGHSA-9298-4cf8-g4wj · GitHub severity CRITICAL · GitHub CVSS 9.1
  4. 2026-11-12 16:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  5. 2026-11-12 03:04 UTCEchelonGraph re-scored
  6. 2026-11-12 03:04 UTCVendor advisory
  7. 2026-11-12 03:04 UTCGHSA enrichmentGHSA-9298-4cf8-g4wj · GitHub severity CRITICAL · GitHub CVSS 9.1
  8. 2026-11-11 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  9. 2026-11-11 01:14 UTCEchelonGraph re-scored
  10. 2026-11-11 01:14 UTCVendor advisory
  11. 2026-11-11 01:14 UTCGHSA enrichmentGHSA-9298-4cf8-g4wj · GitHub severity CRITICAL · GitHub CVSS 9.1
  12. 2026-11-10 16:39 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  13. 2026-11-09 23:16 UTCEchelonGraph re-scored
  14. 2026-11-09 23:16 UTCVendor advisory
  15. 2026-11-09 23:16 UTCGHSA enrichmentGHSA-9298-4cf8-g4wj · GitHub severity CRITICAL · GitHub CVSS 9.1
  16. 2026-11-09 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  17. 2026-11-08 21:26 UTCEchelonGraph re-scored
  18. 2026-11-08 21:26 UTCVendor advisory
  19. 2026-11-08 21:26 UTCGHSA enrichmentGHSA-9298-4cf8-g4wj · GitHub severity CRITICAL · GitHub CVSS 9.1
  20. 2026-11-08 16:36 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  21. 2026-11-07 19:35 UTCEchelonGraph re-scored
  22. 2026-11-07 19:35 UTCVendor advisory
  23. 2026-11-07 19:35 UTCGHSA enrichmentGHSA-9298-4cf8-g4wj · GitHub severity CRITICAL · GitHub CVSS 9.1
  24. 2026-11-07 16:36 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  25. 2026-11-06 17:44 UTCEchelonGraph re-scored
Show 75 more
  1. 2026-11-06 17:44 UTCVendor advisory
  2. 2026-11-06 17:44 UTCGHSA enrichmentGHSA-9298-4cf8-g4wj · GitHub severity CRITICAL · GitHub CVSS 9.1
  3. 2026-11-06 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  4. 2026-11-05 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  5. 2026-11-05 15:54 UTCEchelonGraph re-scored
  6. 2026-11-05 15:54 UTCVendor advisory
  7. 2026-11-05 15:54 UTCGHSA enrichmentGHSA-9298-4cf8-g4wj · GitHub severity CRITICAL · GitHub CVSS 9.1
  8. 2026-11-05 03:55 UTCOSV refresh
  9. 2026-11-04 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  10. 2026-11-04 14:03 UTCEchelonGraph re-scored
  11. 2026-11-04 14:03 UTCVendor advisory
  12. 2026-11-04 14:03 UTCGHSA enrichmentGHSA-9298-4cf8-g4wj · GitHub severity CRITICAL · GitHub CVSS 9.1
  13. 2026-11-03 16:43 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  14. 2026-11-03 12:12 UTCEchelonGraph re-scored
  15. 2026-11-03 12:12 UTCVendor advisory
  16. 2026-11-03 12:12 UTCGHSA enrichmentGHSA-9298-4cf8-g4wj · GitHub severity CRITICAL · GitHub CVSS 9.1
  17. 2026-11-02 16:41 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  18. 2026-11-02 10:19 UTCEchelonGraph re-scored
  19. 2026-11-02 10:19 UTCVendor advisory
  20. 2026-11-02 10:19 UTCGHSA enrichmentGHSA-9298-4cf8-g4wj · GitHub severity CRITICAL · GitHub CVSS 9.1
  21. 2026-11-01 16:31 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  22. 2026-11-01 08:24 UTCVendor advisory
  23. 2026-11-01 08:24 UTCGHSA enrichmentGHSA-9298-4cf8-g4wj · GitHub severity CRITICAL · GitHub CVSS 9.1
  24. 2026-11-01 08:11 UTCGHSA enrichmentGHSA-9298-4cf8-g4wj · GitHub severity CRITICAL · GitHub CVSS 9.1
  25. 2026-11-01 08:11 UTCEchelonGraph re-scored
  26. 2026-10-31 16:30 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  27. 2026-10-31 06:34 UTCEchelonGraph re-scored
  28. 2026-10-31 06:34 UTCVendor advisory
  29. 2026-10-30 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  30. 2026-10-30 04:43 UTCEchelonGraph re-scored
  31. 2026-10-30 04:43 UTCVendor advisory
  32. 2026-10-29 16:31 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  33. 2026-10-29 02:52 UTCEchelonGraph re-scored
  34. 2026-10-29 02:52 UTCVendor advisory
  35. 2026-10-28 16:29 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  36. 2026-10-28 01:01 UTCEchelonGraph re-scored
  37. 2026-10-28 01:01 UTCVendor advisory
  38. 2026-10-27 16:30 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  39. 2026-10-26 23:08 UTCEchelonGraph re-scored
  40. 2026-10-26 23:08 UTCVendor advisory
  41. 2026-10-26 16:29 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  42. 2026-10-25 17:54 UTCVendor advisory
  43. 2026-10-25 16:59 UTCEchelonGraph re-scored
  44. 2026-10-25 16:30 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  45. 2026-10-24 16:30 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  46. 2026-10-24 15:30 UTCEchelonGraph re-scored
  47. 2026-10-24 15:30 UTCVendor advisory
  48. 2026-10-23 16:30 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  49. 2026-10-23 13:37 UTCEchelonGraph re-scored
  50. 2026-10-23 13:37 UTCVendor advisory
  51. 2026-10-22 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  52. 2026-10-22 11:45 UTCEchelonGraph re-scored
  53. 2026-10-22 11:45 UTCVendor advisory
  54. 2026-10-21 16:30 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  55. 2026-10-21 09:52 UTCEchelonGraph re-scored
  56. 2026-10-21 09:52 UTCVendor advisory
  57. 2026-10-20 16:30 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  58. 2026-10-20 08:01 UTCEchelonGraph re-scored
  59. 2026-10-20 08:01 UTCVendor advisory
  60. 2026-10-19 16:30 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  61. 2026-10-19 06:11 UTCEchelonGraph re-scored
  62. 2026-10-19 06:11 UTCVendor advisory
  63. 2026-10-18 16:30 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  64. 2026-10-18 04:19 UTCEchelonGraph re-scored
  65. 2026-10-18 04:19 UTCVendor advisory
  66. 2026-10-17 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  67. 2026-10-17 02:18 UTCEchelonGraph re-scored
  68. 2026-10-17 02:18 UTCVendor advisory
  69. 2026-10-16 16:37 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  70. 2026-10-16 00:26 UTCEchelonGraph re-scored
  71. 2026-10-16 00:26 UTCVendor advisory
  72. 2026-10-15 16:30 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  73. 2026-10-14 18:54 UTCEchelonGraph re-scored
  74. 2026-10-14 18:54 UTCVendor advisory
  75. 2026-10-14 16:30 UTCEPSS rescoreEPSS 0.5% · 40th percentile

Frequently asked(5)

What is CVE-2024-49768?
CVE-2024-49768 is a critical-severity vulnerability; its CVE record was published on October 29, 2024. Waitress is a Web Server Gateway Interface server for Python 2 and 3. A remote client may send a request that is exactly recv_bytes (defaults to 8192) long, followed by a secondary request using HTTP pipelining. When request lookahead is disabled (default) we won't read any more requests, and when…
When was the CVE record for CVE-2024-49768 published?
The CVE record for CVE-2024-49768 was published on October 29, 2024. 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 November 7, 2024; the record at its source may have been updated since.
Is CVE-2024-49768 actively exploited?
CVE-2024-49768 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2024-49768?
CVE-2024-49768 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2024-49768?
A fix for CVE-2024-49768 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2024-49768 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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