CVE-2026-112816

CRITICALPre-NVD 10.010.0
EchelonGraph scoreMEDIUM confidence

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

This critical-severity CVE scores 10.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (23rd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated

Also known asEUVD-2026-114194 (ENISA EUVD) · GHSA-pq55-m3w3-jh54 (GitHub Security Advisories)Source: ENISA EUVD

10.0EG
EchelonGraph verdictPlan mitigationNo fix is confirmed yet: check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Public exploit or proof-of-concept code is available
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 10.0Exploit: Public PoCExposed services: Not assessed

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

The CVE record's CNA (Canonical Ltd.) lists Canonical LXD versions 4.0.14 up to but not including 4.0.15, 5.0.10 up to but not including 5.0.11, 5.21.8 up to but not including 5.21.9 and 6.9.0 up to but not including 6.10.1 as affected. No release containing a fix is confirmed on record.

Improper certificate validation in the HTTPS listener in Canonical LXD 4.0.14, 5.0.10, 5.21.8, 6.9 before 4.0.15, 5.0.11, 5.21.9, 6.10.1 allows an unauthenticated attacker to authenticate as any trusted client and gain full access to the cluster and managed virtual machines via a crafted certificate chain.

CVSS
10.0
EG Score
10.0CRITICALmedium confidence
EG Risk
76
EG Risk 76/100

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)
Severity100% × 45%
Impact severity (EG Severity): CVSS 10.0 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.
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 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: No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.
EPSS PROB
0.3%
EPSS %ILE
23rd
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 (10.0): severity, escalated by confirmed exploitation. This CVE's 10.0 is its impact severity (EG Severity), not escalated.

EG Severity
10.0 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). 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: 3 days if the affected system is publicly exposed; 60 days if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.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).

No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (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)3 days if the affected system is publicly exposed; 60 days if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.

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

October 30, 2026

Last Modified

October 31, 2026

Advisory Details (6)

Auto-updated Nov 7, 2026
No fix on record yet. Sources: github.
GitHub advisoryMentions a patch (unverified)

Authentication bypass through unverified client certificate chains · Advisory · canonical/lxd · GitHub

https://github.com/canonical/lxd/security/advisories/GHSA-99jp-jwmc-65p4
Web page

Security advisory: Critical vulnerability found in Canonical LXD and MicroCloud - News - Ubuntu Discourse

https://discourse.ubuntu.com/t/security-advisory-critical-vulnerability-found-in-canonical-lxd-and-microcloud/90557
Web page

LXD 6.10.1 LTS has been released - News - Ubuntu Discourse

https://discourse.ubuntu.com/t/lxd-6-10-1-lts-has-been-released/90024
Web page

LXD 5.21.9 LTS has been released - News - Ubuntu Discourse

https://discourse.ubuntu.com/t/lxd-5-21-9-lts-has-been-released/90565/1
Web page

LXD 5.0.11 LTS has been released - News - Ubuntu Discourse

https://discourse.ubuntu.com/t/lxd-5-0-11-lts-has-been-released/90570/1
Web page

LXD 4.0.15 LTS has been released - News - Ubuntu Discourse

https://discourse.ubuntu.com/t/lxd-4-0-15-lts-has-been-released/90571

Vendor Advisories for CVE-2026-112816(1)

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

Affected Packages

(2 across 2 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
lxd5.0.2+git20231211.1364ae4-1 ... 5.0.2-6 (17 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
lxd5.0.2+git20231211.1364ae4-9 ... 5.0.2+git20231211.1364ae4-9+deb13u7 (8 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 34× 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 → 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. 2026-11-13 01:15 UTCEchelonGraph re-scored
  2. 2026-11-13 01:15 UTCGHSA enrichmentGHSA-pq55-m3w3-jh54 · GitHub severity CRITICAL
  3. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  4. 2026-11-12 01:56 UTCEchelonGraph re-scored
  5. 2026-11-12 01:56 UTCGHSA enrichmentGHSA-pq55-m3w3-jh54 · GitHub severity CRITICAL
  6. 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  7. 2026-11-11 02:39 UTCEchelonGraph re-scored
  8. 2026-11-11 02:38 UTCGHSA enrichmentGHSA-pq55-m3w3-jh54 · GitHub severity CRITICAL
  9. 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  10. 2026-11-10 12:56 UTCEchelonGraph re-scored
  11. 2026-11-10 12:56 UTCGHSA enrichmentGHSA-pq55-m3w3-jh54 · GitHub severity CRITICAL
  12. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  13. 2026-11-09 13:39 UTCEchelonGraph re-scored
  14. 2026-11-09 13:39 UTCGHSA enrichmentGHSA-pq55-m3w3-jh54 · GitHub severity CRITICAL
  15. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  16. 2026-11-08 14:22 UTCEchelonGraph re-scored
  17. 2026-11-08 14:22 UTCGHSA enrichmentGHSA-pq55-m3w3-jh54 · GitHub severity CRITICAL
  18. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  19. 2026-11-07 15:01 UTCEchelonGraph re-scored
  20. 2026-11-07 15:01 UTCGHSA enrichmentGHSA-pq55-m3w3-jh54 · GitHub severity CRITICAL
  21. 2026-11-06 16:36 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  22. 2026-11-06 15:43 UTCEchelonGraph re-scored
  23. 2026-11-06 15:43 UTCGHSA enrichmentGHSA-pq55-m3w3-jh54 · GitHub severity CRITICAL
  24. 2026-11-05 23:25 UTCOSV refresh
  25. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
Show 26 more
  1. 2026-11-05 16:26 UTCGHSA enrichmentGHSA-pq55-m3w3-jh54 · GitHub severity CRITICAL
  2. 2026-11-04 17:40 UTCEchelonGraph re-scored
  3. 2026-11-04 17:40 UTCGHSA enrichmentGHSA-pq55-m3w3-jh54 · GitHub severity CRITICAL
  4. 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  5. 2026-11-03 18:23 UTCGHSA enrichmentGHSA-pq55-m3w3-jh54 · GitHub severity CRITICAL
  6. 2026-11-03 16:51 UTCEchelonGraph re-scored
  7. 2026-11-03 16:51 UTCGHSA enrichmentGHSA-pq55-m3w3-jh54 · GitHub severity CRITICAL
  8. 2026-11-03 16:46 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  9. 2026-11-02 17:28 UTCEchelonGraph re-scored
  10. 2026-11-02 17:28 UTCGHSA enrichmentGHSA-pq55-m3w3-jh54 · GitHub severity CRITICAL
  11. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  12. 2026-11-02 16:33 UTCGHSA enrichmentGHSA-pq55-m3w3-jh54 · GitHub severity CRITICAL
  13. 2026-11-02 03:01 UTCEchelonGraph re-scored
  14. 2026-11-02 03:01 UTCGHSA enrichmentGHSA-pq55-m3w3-jh54 · GitHub severity CRITICAL
  15. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  16. 2026-11-01 03:43 UTCEchelonGraph re-scored
  17. 2026-11-01 03:43 UTCGHSA enrichmentGHSA-pq55-m3w3-jh54 · GitHub severity CRITICAL
  18. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  19. 2026-10-31 04:26 UTCEchelonGraph re-scored
  20. 2026-10-31 04:26 UTCGHSA enrichmentGHSA-pq55-m3w3-jh54 · GitHub severity CRITICAL
  21. 2026-10-31 03:59 UTCEchelonGraph re-scored
  22. 2026-10-31 03:59 UTCGHSA enrichmentGHSA-pq55-m3w3-jh54 · GitHub severity CRITICAL
  23. 2026-10-30 18:02 UTCENISA EUVD ID recordedEUVD-2026-114194 · Source: ENISA EUVD
  24. 2026-10-30 17:26 UTCEchelonGraph re-scored
  25. 2026-10-30 16:45 UTCEchelonGraph re-scoredFirst assessed: 10.0 CRITICAL
  26. 2026-10-30 16:44 UTCMITRE cvelistV5first tracked

Publicly available exploits

(2 references)

Public exploit code is referenced for this CVE (2 GitHub PoCs). No fix is confirmed yet, so defenders should restrict or isolate affected systems accordingly until one is published.

  • GitHub PoCMrNarsus/cve-2026-112816-poc
    Published Nov 1, 2026

    Independent lab reproduction and post-patch verification tool for CVE-2026-112816 (LXD/MicroCloud mTLS chain bypass).

    Open source ↗
  • GitHub PoCdehasoft-tr/cve-2026-112816
    Published Oct 31, 2026
    Open source ↗

Frequently asked(5)

What is CVE-2026-112816?
CVE-2026-112816 is a critical-severity vulnerability; its CVE record was published on October 30, 2026. Improper certificate validation in the HTTPS listener in Canonical LXD 4.0.14, 5.0.10, 5.21.8, 6.9 before 4.0.15, 5.0.11, 5.21.9, 6.10.1 allows an unauthenticated attacker to authenticate as any trusted client and gain full access to the cluster and managed virtual machines via a crafted…
When was the CVE record for CVE-2026-112816 published?
The CVE record for CVE-2026-112816 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 31, 2026; the record at its source may have been updated since.
Is CVE-2026-112816 actively exploited?
CVE-2026-112816 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (23rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-112816?
CVE-2026-112816 has a CVSS base score of 10.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-112816?
No fix for CVE-2026-112816 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 CVE record's CNA (Canonical Ltd.) lists Canonical LXD versions 4.0.14 up to but not including 4.0.15, 5.0.10 up to but not including 5.0.11, 5.21.8 up to but not including 5.21.9 and 6.9.0 up to but not including 6.10.1 as affected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-112816 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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