CVE-2026-34783

HIGHNVD 8.18.1
EchelonGraph scoreMEDIUM confidence

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

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-04-01. NVD baseline CVSS 8.1; sources differ by 0.0.

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

Also known asEUVD-2026-19353 (ENISA EUVD) · GHSA-j6v5-g24h-vg4j (GitHub Security Advisories) · GO-2026-5452 (OSV.dev)Source: ENISA EUVD

8.1EG
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).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.1Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Ferret is a declarative system for working with web data. Prior to 2.0.0-alpha.4, a path traversal vulnerability in Ferret's IO::FS::WRITE standard library function allows a malicious website to write arbitrary files to the filesystem of the machine running Ferret. When an operator scrapes a website that returns filenames containing ../ sequences, and uses those filenames to construct output paths (a standard scraping pattern), the attacker controls both the destination path and the file content. This can lead to remote code execution via cron jobs, SSH authorized_keys, shell profiles, or web shells. This vulnerability is fixed in 2.0.0-alpha.4.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
52
EG Risk 52/100

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)
Severity81% × 45%
Impact severity (EG Severity): CVSS 8.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (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
44th
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 (8.1): severity, escalated by confirmed exploitation. This CVE's 8.1 is its impact severity (EG Severity), not escalated.

EG Severity
8.1 HIGHCVSS-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 2026-11-07). 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, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade 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, Track* at medium and Attend at high mission impact.

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

Exploitation public PoC (CISA Vulnrichment) · Automatable no (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)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (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

April 6, 2026

Last Modified

October 23, 2026

Advisory Details (2)

Auto-updated Jun 10, 2026
Patch available. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)

Path Traversal in IO::FS::WRITE allows arbitrary file write when scraping malicious websites · Advisory · MontFerret/ferret · GitHub

https://github.com/MontFerret/ferret/security/advisories/GHSA-j6v5-g24h-vg4j
GitHub commit Patch Available

commit 160ebad6bd50 (MontFerret/ferret)

Patch available: MontFerret/ferret v2.0.0-alpha.4 (contains commit 160ebad6bd50)

https://github.com/MontFerret/ferret/commit/160ebad6bd50f153453e120f6d909f5b83322917

Vendor Advisories for CVE-2026-34783(1)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
gogithub.com/MontFerret/ferret—ghsa
gogithub.com/MontFerret/ferret/v2 @ 2.0.0-alpha.4 (fixes < 2.0.0-alpha.4)—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

(2 across 1 ecosystem)
Go(2)
PackageVulnerable rangeFix by version rangeDependents
github.com/MontFerret/ferret—
  • every version through 0.18.1: no fix on record
—
github.com/MontFerret/ferret/v2—
  • every version up to 2.0.0-alpha.4: fixed in 2.0.0-alpha.4
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 31× 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 228 rows on record for this CVE, as 99 entries (1 repeat merged).

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. 1 repeat row among the latest 100 is merged into the row it repeats. The 128 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  2. 2026-11-11 16:39 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  3. 2026-11-10 16:43 UTCEPSS rescoreEPSS 0.5% · 44th percentile
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  5. 2026-11-08 16:39 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  6. 2026-11-08 05:31 UTCEchelonGraph re-scored
  7. 2026-11-08 05:31 UTCGHSA enrichmentGHSA-j6v5-g24h-vg4j · GitHub severity HIGH · GitHub CVSS 8.1
  8. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  9. 2026-11-06 16:37 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  10. 2026-11-05 16:37 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  11. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  12. 2026-11-03 16:47 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  13. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  14. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  15. 2026-11-01 07:52 UTCGHSA enrichmentGHSA-j6v5-g24h-vg4j · GitHub severity HIGH · GitHub CVSS 8.1
  16. 2026-11-01 07:52 UTCEchelonGraph re-scored
  17. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  18. 2026-10-31 14:30 UTCEchelonGraph re-scored
  19. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  20. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  21. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  22. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  23. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  24. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  25. 2026-10-25 14:33 UTCEchelonGraph re-scored
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  1. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  2. 2026-10-23 23:28 UTCEchelonGraph re-scored
  3. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  4. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  5. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  6. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  7. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  8. 2026-10-18 03:45 UTCEchelonGraph re-scored
  9. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  10. 2026-10-17 15:29 UTCEchelonGraph re-scored
  11. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  12. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  13. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  14. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  15. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  16. 2026-10-12 16:12 UTCEchelonGraph re-scored
  17. 2026-10-11 19:54 UTCEchelonGraph re-scored
  18. 2026-10-11 17:07 UTCEchelonGraph re-scored
  19. 2026-10-11 14:34 UTCEchelonGraph re-scored
  20. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  21. 2026-10-11 00:22 UTCOSV refresh
  22. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
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  30. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.7% · 51st percentile
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  34. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  35. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  36. 2026-09-21 12:19 UTCOSV refresh
  37. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  38. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
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  53. 2026-09-02 09:44 UTCOSV refresh
  54. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.5% · 41st percentile
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  62. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.5% · 41st percentile
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  68. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  69. 2026-08-16 08:24 UTCEchelonGraph re-scored
  70. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  71. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  72. 2026-08-14 05:32 UTCEchelonGraph re-scored
  73. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  74. 2026-08-12 19:47 UTCEchelonGraph re-scored

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Frequently asked(5)

What is CVE-2026-34783?
CVE-2026-34783 is a high-severity vulnerability; its CVE record was published on April 6, 2026. Ferret is a declarative system for working with web data. Prior to 2.0.0-alpha.4, a path traversal vulnerability in Ferret's IO::FS::WRITE standard library function allows a malicious website to write arbitrary files to the filesystem of the machine running Ferret. When an operator scrapes a…
When was the CVE record for CVE-2026-34783 published?
The CVE record for CVE-2026-34783 was published on April 6, 2026. 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 October 23, 2026; the record at its source may have been updated since.
Is CVE-2026-34783 actively exploited?
CVE-2026-34783 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-34783?
CVE-2026-34783 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-34783?
A fix for CVE-2026-34783 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-34783 are linked in the Vendor Advisories panel on this page.

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