CVE-2026-22661

HIGHPre-NVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-04-03. a secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

prompts.chat prior to commit 0f8d4c3 contains a path traversal vulnerability in skill file handling that allows attackers to write arbitrary files to the client system by crafting malicious ZIP archives with unsanitized filenames containing path traversal sequences. Attackers can exploit missing server-side filename validation to inject path traversal sequences ../ into skill file archives, which when extracted by vulnerable tools writing files outside the intended directory and overwriting shell initialization files to achieve code execution.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
52(Track)
EG Risk 52/100SSVC: Track

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
Severity81% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

April 3, 2026

Last Modified

July 24, 2026

Advisory Details (3)

Auto-updated Jun 10, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit, github_pr.
generic

prompts.chat Path Traversal via Skill File Handling | Advisories | VulnCheck

https://www.vulncheck.com/advisories/prompts-chat-path-traversal-via-skill-file-handling
github_pr

Fix: # Vulnerability Report: Path Traversal / Zip Slip in Skill Files lead to RCE on Client

Fix merged in f/prompts.chat PR #1101 on 2026-03-29 — awaiting tagged release

https://github.com/f/prompts.chat/pull/1101
github_commit

commit 0f8d4c381abd (f/prompts.chat)

Fix landed in f/prompts.chat commit 0f8d4c381abd — awaiting tagged release

https://github.com/f/prompts.chat/commit/0f8d4c381abd7b2d7478c9fdee9522149c2d65e5

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 49× 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 132 total refreshes for this CVE.

  1. 2026-07-27 14:13 UTCEPSS rescore
  2. 2026-07-26 14:54 UTCEPSS rescore
  3. 2026-07-26 14:54 UTCEPSS rescore
  4. 2026-07-26 09:16 UTCEG score recompute
  5. 2026-07-26 09:16 UTCGHSA enrichment
  6. 2026-07-25 14:17 UTCEPSS rescore
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  11. 2026-07-23 03:06 UTCEG score recompute
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  25. 2026-07-15 16:57 UTCEPSS rescore
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  1. 2026-07-15 16:57 UTCEPSS rescore
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  25. 2026-06-28 14:07 UTCEPSS rescore
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  27. 2026-06-28 04:56 UTCEPSS rescore
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  51. 2026-06-11 21:56 UTCGHSA enrichment
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  54. 2026-06-10 15:59 UTCGHSA enrichment
  55. 2026-06-10 13:22 UTCEPSS rescore
  56. 2026-06-10 03:13 UTCGHSA enrichment
  57. 2026-06-09 14:28 UTCGHSA enrichment
  58. 2026-06-08 14:17 UTCEPSS rescore
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  60. 2026-06-08 13:21 UTCGHSA enrichment
  61. 2026-06-08 00:36 UTCGHSA enrichment
  62. 2026-06-07 15:25 UTCEPSS rescore
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  64. 2026-06-07 10:50 UTCGHSA enrichment
  65. 2026-06-06 13:47 UTCEPSS rescore
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  74. 2026-06-02 20:13 UTCEPSS rescore
  75. 2026-06-02 20:13 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-22661?
CVE-2026-22661 is a high vulnerability published on April 3, 2026. prompts.chat prior to commit 0f8d4c3 contains a path traversal vulnerability in skill file handling that allows attackers to write arbitrary files to the client system by crafting malicious ZIP archives with unsanitized filenames containing path traversal sequences. Attackers can exploit missing…
When was CVE-2026-22661 disclosed?
CVE-2026-22661 was first published in the National Vulnerability Database on April 3, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-22661 actively exploited?
CVE-2026-22661 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 71.1% of all scored CVEs.
What is the CVSS score of CVE-2026-22661?
CVE-2026-22661 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-22661?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-22661, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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