CVE-2026-57863

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-25. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
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%CVSS: 8.8Exploit: Elevated riskExposed: 0

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

Crater Invoice through 6.0.6 contains a path traversal vulnerability in the self-update API that allows authenticated company owners to write arbitrary files outside the intended extraction directory by supplying crafted ZIP archives with ../ sequences to the unzip endpoint. Attackers can exploit unsanitized ZIP entry names passed to PHP's ZipArchive::extractTo() to write arbitrary PHP files into the web-accessible public directory and achieve remote code execution on the server.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
56(Track*)
EG Risk 56/100SSVC: 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
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
45%
KEV
Not listed

Published

August 25, 2026

Last Modified

August 25, 2026

Advisory Details (2)

Auto-updated Aug 25, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

Crater Invoice 6.0.6 Path Traversal RCE via update/unzip endpoint | Advisories | VulnCheck

https://www.vulncheck.com/advisories/crater-invoice-path-traversal-rce-via-update-unzip-endpoint
generic🟡 PoC Available

CVE-2026-57863 — ZIP-Slip via Updater Endpoint Enables RCE in Crater Invoice · GitHub

https://gist.github.com/sermikr0/cc58727e6a777b6ea1104e923803a0ba

Vendor Advisories for CVE-2026-57863(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 22× in last 7d / 22× 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.

  1. 2026-08-30 02:15 UTCEG score recompute
  2. 2026-08-30 02:15 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-29 13:16 UTCGHSA enrichment
  5. 2026-08-29 00:17 UTCEG score recompute
  6. 2026-08-29 00:16 UTCGHSA enrichment
  7. 2026-08-28 21:42 UTCEPSS rescore
  8. 2026-08-28 08:44 UTCGHSA enrichment
  9. 2026-08-27 19:44 UTCEG score recompute
  10. 2026-08-27 19:44 UTCGHSA enrichment
  11. 2026-08-27 14:25 UTCEPSS rescore
  12. 2026-08-27 06:45 UTCGHSA enrichment
  13. 2026-08-26 17:46 UTCEG score recompute
  14. 2026-08-26 17:46 UTCGHSA enrichment
  15. 2026-08-26 14:46 UTCEPSS rescore
  16. 2026-08-26 04:21 UTCEG score recompute
  17. 2026-08-26 04:21 UTCGHSA enrichment
  18. 2026-08-25 15:21 UTCEG score recompute
  19. 2026-08-25 14:56 UTCEG score recompute
  20. 2026-08-25 13:22 UTCEG score recompute
  21. 2026-08-25 13:16 UTCEG score recompute
  22. 2026-08-25 13:15 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-57863?
CVE-2026-57863 is a high vulnerability published on August 25, 2026. Crater Invoice through 6.0.6 contains a path traversal vulnerability in the self-update API that allows authenticated company owners to write arbitrary files outside the intended extraction directory by supplying crafted ZIP archives with ../ sequences to the unzip endpoint. Attackers can exploit…
When was CVE-2026-57863 disclosed?
CVE-2026-57863 was first published in the National Vulnerability Database on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57863 actively exploited?
CVE-2026-57863 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 55.5% of all scored CVEs.
What is the CVSS score of CVE-2026-57863?
CVE-2026-57863 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-57863?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57863, 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.

Dependency Blast Radius

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