CVE-2024-49769

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 1.4% (71st percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.4%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Waitress is a Web Server Gateway Interface server for Python 2 and 3. When a remote client closes the connection before waitress has had the opportunity to call getpeername() waitress won't correctly clean up the connection leading to the main thread attempting to write to a socket that no longer exists, but not removing it from the list of sockets to attempt to process. This leads to a busy-loop calling the write function. A remote attacker could run waitress out of available sockets with very little resources required. Waitress 3.0.1 contains fixes that remove the race condition.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100CISA 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%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
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
1.4%
EPSS %ILE
71st
KEV
Not listed

CISA SSVCTrack 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 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

October 29, 2024

Last Modified

November 21, 2024

Advisory Details (5)

Auto-updated Oct 1, 2026
Patch available. Sources: github_commit, github_pr, github.
genericMentions a patch (unverified)

[SECURITY] [DLA 3955-1] waitress security update

https://lists.debian.org/debian-lts-announce/2024/11/msg00012.html
githubMentions a patch (unverified)

DoS leading to high CPU usage/resource exhaustion · Advisory · Pylons/waitress · GitHub

https://github.com/Pylons/waitress/security/advisories/GHSA-3f84-rpwh-47g6
github_pr Patch Available

Remove race condition when creating new HTTPChannel

Patch available: Pylons/waitress v3.0.1 (PR #435 merged 2024-06-08)

https://github.com/Pylons/waitress/pull/435
generic

100% cpu in mainthread due to not closing properly? (channel.connected == False) · Issue #418 · Pylons/waitress · GitHub

https://github.com/Pylons/waitress/issues/418
github_commit Patch Available

commit 1ae4e894c9f7 (Pylons/waitress)

Patch available: Pylons/waitress v3.0.1 (contains commit 1ae4e894c9f7)

https://github.com/Pylons/waitress/commit/1ae4e894c9f76543bee06584001583fc6fa8c95c

Vendor Advisories for CVE-2024-49769(1)

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

Patch Availability(4)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntupython3-waitress (2.1.2-2ubuntu0.1~esm1) @ noble2026-05-23ubuntu
redhatpython-waitress-0:2.0.0-4.el8ost2025-02-10redhat
redhatpython-waitress-0:2.0.0-4.el9ost2025-02-10redhat
redhatpython-waitress-0:3.0.1-1.el92024-12-12redhat

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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
waitress1.4.4-1.1, 1.4.4-1.1+deb11u1
  • every version up to 1.4.4-1.1+deb11u2: fixed in 1.4.4-1.1+deb11u2
—
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
waitress0.1 ... 3.0.0 (50 versions)
  • every version up to 3.0.1: fixed in 3.0.1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(10)

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 / 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 186 total refreshes for this CVE.

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

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

Same vendor

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redhat:RHSA-2024:10145

Frequently asked(5)

What is CVE-2024-49769?
CVE-2024-49769 is a high vulnerability published on October 29, 2024. Waitress is a Web Server Gateway Interface server for Python 2 and 3. When a remote client closes the connection before waitress has had the opportunity to call getpeername() waitress won't correctly clean up the connection leading to the main thread attempting to write to a socket that no longer…
When was CVE-2024-49769 disclosed?
CVE-2024-49769 was first published on October 29, 2024, 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-2024-49769 actively exploited?
CVE-2024-49769 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.4% probability of exploitation in the next 30 days (71st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2024-49769?
CVE-2024-49769 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2024-49769?
A fix for CVE-2024-49769 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2024-49769 are linked in the Vendor Advisories panel on this page.

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