CVE-2021-41146

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 1.5% (73rd 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
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.5%CVSS: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

qutebrowser is an open source keyboard-focused browser with a minimal GUI. Starting with qutebrowser v1.7.0, the Windows installer for qutebrowser registers a qutebrowserurl: URL handler. With certain applications, opening a specially crafted qutebrowserurl:... URL can lead to execution of qutebrowser commands, which in turn allows arbitrary code execution via commands such as :spawn or :debug-pyeval. Only Windows installs where qutebrowser is registered as URL handler are affected. The issue has been fixed in qutebrowser v2.4.0. The fix also adds additional hardening for potential similar issues on Linux (by adding the new --untrusted-args flag to the .desktop file), though no such vulnerabilities are known.

CVSS v3
8.8
EG Score
8.8HIGHmedium 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
Severity88% × 45%
Exploitation2% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or 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
1.5%
EPSS %ILE
73rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or 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 (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). 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 21, 2021

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated Aug 28, 2026
Patch available. Sources: github_commit, github.
githubMentions a patch (unverified)

Arbitrary command execution in qutebrowser on Windows via URL handler · Advisory · qutebrowser/qutebrowser · GitHub

https://github.com/qutebrowser/qutebrowser/security/advisories/GHSA-vw27-fwjf-5qxm
github_commit

commit 8f46ba3f6dc7 (qutebrowser/qutebrowser)

Fix landed in qutebrowser/qutebrowser commit 8f46ba3f6dc7 — awaiting tagged release

https://github.com/qutebrowser/qutebrowser/commit/8f46ba3f6dc7b18375f7aa63c48a1fe461190430

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
qutebrowser0.0.0 ... 2.3.1 (64 versions)
  • 1.7.0 up to 2.4.0: fixed in 2.4.0
  • every version up to 1.8.0: fixed in 1.8.0
  • 2.0.0 up to 2.4.0: fixed in 2.4.0
—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 7× 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 189 total refreshes for this CVE.

  1. 2026-10-09 20:04 UTCEPSS rescore
  2. 2026-10-08 16:40 UTCEPSS rescore
  3. 2026-10-07 23:45 UTCEPSS rescore
  4. 2026-10-06 15:14 UTCEPSS rescore
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  10. 2026-09-30 15:41 UTCEG score recompute
  11. 2026-09-30 15:00 UTCEPSS rescore
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  17. 2026-09-25 14:15 UTCOSV refresh
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  1. 2026-09-17 19:23 UTCEPSS rescore
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  10. 2026-09-06 13:45 UTCEPSS rescore
  11. 2026-09-06 05:22 UTCOSV refresh
  12. 2026-09-05 15:25 UTCEPSS rescore
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  25. 2026-08-24 14:13 UTCEPSS rescore
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  27. 2026-08-21 23:46 UTCEPSS rescore
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  30. 2026-08-19 17:01 UTCEPSS rescore
  31. 2026-08-19 16:29 UTCOSV refresh
  32. 2026-08-18 13:45 UTCEPSS rescore
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  37. 2026-08-13 21:57 UTCEPSS rescore
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  40. 2026-08-09 13:44 UTCEPSS rescore
  41. 2026-08-08 16:33 UTCEPSS rescore
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  44. 2026-08-05 19:14 UTCEPSS rescore
  45. 2026-08-04 11:57 UTCOSV refresh
  46. 2026-08-04 10:34 UTCEPSS rescore
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  50. 2026-07-30 16:25 UTCEPSS rescore
  51. 2026-07-30 01:28 UTCEPSS rescore
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  55. 2026-07-25 14:15 UTCEPSS rescore
  56. 2026-07-24 14:15 UTCEPSS rescore
  57. 2026-07-23 14:16 UTCEPSS rescore
  58. 2026-07-23 02:04 UTCEG score recompute
  59. 2026-07-22 22:50 UTCEG score recompute
  60. 2026-07-22 14:06 UTCEPSS rescore
  61. 2026-07-21 15:22 UTCEPSS rescore
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  63. 2026-07-20 17:05 UTCEPSS rescore
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  66. 2026-07-18 10:02 UTCEPSS rescore
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  68. 2026-07-18 09:29 UTCOSV refresh
  69. 2026-07-16 17:00 UTCEPSS rescore
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  71. 2026-07-15 16:55 UTCEPSS rescore
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  73. 2026-07-15 01:58 UTCEPSS rescore
  74. 2026-07-13 22:27 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2021-41146?
CVE-2021-41146 is a high vulnerability published on October 21, 2021. qutebrowser is an open source keyboard-focused browser with a minimal GUI. Starting with qutebrowser v1.7.0, the Windows installer for qutebrowser registers a qutebrowserurl: URL handler. With certain applications, opening a specially crafted qutebrowserurl:... URL can lead to execution of…
When was CVE-2021-41146 disclosed?
CVE-2021-41146 was first published on October 21, 2021, 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-2021-41146 actively exploited?
CVE-2021-41146 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.5% probability of exploitation in the next 30 days (73rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2021-41146?
CVE-2021-41146 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2021-41146?
A fix for CVE-2021-41146 is available: update to the fixed version the vendor names in its advisory.

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