cc-connect through 1.5.0 contains a missing authentication vulnerability in the MAX platform adapter webhook mode in platform/max/max.go that accepts unauthenticated updates when no webhook_secret is configured. Remote attackers reaching the webhook listener on port 8080 can forge updates with an allowed or admin user_id to run privileged commands like /shell on the host.
CVE-2026-108549
HIGHPre-NVD 8.18.1Trending — 4 sources updated this week
EchelonGraph scoreHIGH confidence
“—” beside the score: it is equal to the CVSS score beside it.
Score 8.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-10-10. A secondary CVSS source baseline 8.1; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
8.1EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.1Exploit: None knownExposed services: Not assessed
No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.
- CVSS v3
- 8.1
- EG Score
- 8.1HIGHhigh confidence
- EG Risk
- 37EG Risk 37/100
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 (value × EchelonGraph’s weight)Severity81% × 45%The EG Score, 8.1 of 10.Exploitation0.4% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CVSS v4.0 confidentiality and integrity impact both High). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix. - EPSS PROB
- 0.5%
- EPSS %ILE
- 37th
- KEV
- Not listed
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).
No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CVSS v4.0 confidentiality and integrity impact both High). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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.
In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CVSS v4.0 confidentiality and integrity impact both High). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” 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 10, 2026
Last Modified
October 10, 2026
Advisory Details (3)
Auto-updated Oct 10, 2026No fix on record yet.
Web page
cc-connect through 1.5.0 Missing Authentication via MAX Webhook Sender Spoofing | Advisories | VulnCheck
https://www.vulncheck.com/advisories/cc-connect-through-1.5.0-missing-authentication-via-max-webhook-sender-spoofingWeb page
GitHub - chenhg5/cc-connect: Bridge local AI coding agents (Claude Code, Cursor, Gemini CLI, Codex) to messaging platforms (Feishu/Lark, DingTalk, Slack, Telegram, Discord, LINE, WeChat Work). Chat with your AI dev assistant from anywhere — no public IP required for most platforms. · GitHub
https://github.com/chenhg5/cc-connectWeb page
MAX webhook mode accepts unsigned events when webhook_secret is unset, allowing sender spoofing · Issue #1968 · chenhg5/cc-connect · GitHub
https://github.com/chenhg5/cc-connect/issues/1968Vendor Advisories for CVE-2026-108549(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 10× in last 7d / 10× 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 it from the CNA feed. 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). Most recent first.
- 2026-10-11 20:13 UTCEG score recompute
- 2026-10-11 17:51 UTCEG score recompute
- 2026-10-11 17:51 UTCGHSA enrichmentGHSA-h8j8-r6g6-37hc · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-11 14:59 UTCEG score recompute
- 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
- 2026-10-11 04:41 UTCEG score recompute
- 2026-10-11 04:40 UTCGHSA enrichmentGHSA-h8j8-r6g6-37hc · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-10 15:30 UTCEG score recompute
- 2026-10-10 14:45 UTCEG score recomputeFirst assessed: 8.1 HIGH
- 2026-10-10 14:45 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-108549?
CVE-2026-108549 is a high-severity vulnerability; its CVE record was published on October 10, 2026. cc-connect through 1.5.0 contains a missing authentication vulnerability in the MAX platform adapter webhook mode in platform/max/max.go that accepts unauthenticated updates when no webhooksecret is configured. Remote attackers reaching the webhook listener on port 8080 can forge updates with an…
When was CVE-2026-108549 made public?
CVE-2026-108549 was made public on October 6, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on October 10, 2026. EchelonGraph's copy of the record carries a last-modified date of October 10, 2026; the record at its source may have been updated since.
Is CVE-2026-108549 actively exploited?
CVE-2026-108549 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-108549?
CVE-2026-108549 has a CVSS base score of 8.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-108549?
No fix for CVE-2026-108549 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-108549 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-108549
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