CVE-2026-62331

HIGHPre-NVD 8.28.2
EchelonGraph scoreHIGH confidence

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

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-11-03. A secondary CVSS source baseline 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-114361 (ENISA EUVD) · GHSA-48v2-6jcm-fc99 (GitHub Security Advisories) · GO-2026-6908 (OSV.dev)Source: ENISA EUVD

8.2EG
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).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 8.2Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

praktor is a multi-agent Claude Code orchestrator with Telegram input and output, Docker isolation, and a Mission Control UI. Prior to 0.9.1, both Telegram upload sites in internal/telegram/bot.go concatenate the attacker-controlled document filename into a destination path without sanitization, and path.Join collapses parent-directory traversal. A remote Telegram user who can message the bot can therefore write outside uploads/ within the persistent agent workspace mounted at /workspace/agent. Because allow_from: [] permits all senders by default, no prior authentication or privilege is required in that configuration. The attacker can plant or overwrite CLAUDE.md, instruction, skill, hook, or configuration files that the Claude agent reads and operates on across later runs, turning a document upload into stored instruction injection. The demonstrated arbitrary-write scope is the persistent agent workspace volume, not an unrestricted host-filesystem write. This issue is fixed in version 0.9.1.

CVSS v3
8.2
EG Score
8.2HIGHhigh 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)
Severity82% × 45%
Impact severity (EG Severity): CVSS 8.2 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.8% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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
0.8%
EPSS %ILE
56th
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 (8.2): severity, escalated by confirmed exploitation. This CVE's 8.2 is its impact severity (EG Severity), not escalated.

EG Severity
8.2 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.8% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-10). 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 or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days 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 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). 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; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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

October 30, 2026

Last Modified

October 30, 2026

Advisory Details (4)

Auto-updated Oct 30, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit, github_pr, github_release.
GitHub advisoryMentions a patch (unverified)🟡 PoC Available

Path traversal in Telegram file uploads allows writing outside the agent workspace uploads/ directory (stored instruction injection) · Advisory · mtzanidakis/praktor · GitHub

https://github.com/mtzanidakis/praktor/security/advisories/GHSA-48v2-6jcm-fc99
GitHub release Patch Available

v0.9.1

Patch available: mtzanidakis/praktor v0.9.1

https://github.com/mtzanidakis/praktor/releases/tag/v0.9.1
GitHub pull request Patch Available

fix(security): prevent upload filename path traversal out of uploads/

Patch available: mtzanidakis/praktor v0.9.1 (PR #228 merged 2026-06-26)

https://github.com/mtzanidakis/praktor/pull/228
GitHub commit Patch Available

commit c3731eeda01c (mtzanidakis/praktor)

Patch available: mtzanidakis/praktor v0.9.1 (contains commit c3731eeda01c)

https://github.com/mtzanidakis/praktor/commit/c3731eeda01c0b3ec1dbd13cccd5a147c3182141

Vendor Advisories for CVE-2026-62331(1)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
gogithub.com/mtzanidakis/praktor @ 0.9.1 (fixes <= 0.9.0)—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

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/mtzanidakis/praktor—
  • every version up to 0.9.1: fixed in 0.9.1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 16× 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.

  1. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  2. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  3. 2026-11-11 08:17 UTCEchelonGraph re-scored
  4. 2026-11-11 08:17 UTCGHSA enrichmentGHSA-48v2-6jcm-fc99 · GitHub severity HIGH · GitHub CVSS 8.2
  5. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  6. 2026-11-09 16:35 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  7. 2026-11-08 16:40 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  8. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  9. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  10. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  11. 2026-11-04 16:36 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  12. 2026-11-03 20:19 UTCEchelonGraph re-scored
  13. 2026-11-03 20:19 UTCGHSA enrichmentGHSA-48v2-6jcm-fc99 · GitHub severity HIGH · GitHub CVSS 8.2
  14. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  15. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  16. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  17. 2026-10-30 21:02 UTCENISA EUVD ID recordedEUVD-2026-114361 · Source: ENISA EUVD
  18. 2026-10-30 19:29 UTCEchelonGraph re-scored
  19. 2026-10-30 19:16 UTCEchelonGraph re-scoredFirst assessed: 8.2 HIGH
  20. 2026-10-30 19:16 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-62331?
CVE-2026-62331 is a high-severity vulnerability; its CVE record was published on October 30, 2026. praktor is a multi-agent Claude Code orchestrator with Telegram input and output, Docker isolation, and a Mission Control UI. Prior to 0.9.1, both Telegram upload sites in internal/telegram/bot.go concatenate the attacker-controlled document filename into a destination path without sanitization,…
When was the CVE record for CVE-2026-62331 published?
The CVE record for CVE-2026-62331 was published on October 30, 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 30, 2026; the record at its source may have been updated since.
Is CVE-2026-62331 actively exploited?
CVE-2026-62331 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (56th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-62331?
CVE-2026-62331 has a CVSS base score of 8.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-62331?
A fix for CVE-2026-62331 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-62331 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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