CVE-2026-16033

HIGHPre-NVD 8.58.5
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (27th 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
8.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (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: 0.4%CVSS: 8.5Exploit: No code on recordExposed services: Not assessed

Upgrade to LXD version 4.0.12 or later, or 5.0.8 or later (from the CVE record's solution, Canonical Ltd.) — apply it.

A path traversal vulnerability in LXD allows an attacker to achieve arbitrary host file read or unconstrained file creation. When processing image metadata templates, LXD fails to properly sanitize or restrict template file paths from escaping the instance templates directory (specifically affecting virtual machine / QEMU driver execution paths). An attacker can exploit this flaw by providing a crafted image archive with malicious template directives containing path traversal sequences, causing LXD to access or write files outside the intended template directory on the host system.

CVSS v3
8.5
EG Score
8.5HIGHmedium confidence
EG Risk
54
EG Risk 54/100

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)
Severity85% × 45%
The EG Score, 8.5 of 10.
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 or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (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: Upgrade to LXD version 4.0.12 or later, or 5.0.8 or later (from the CVE record's solution, Canonical Ltd.). Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
27th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

Upgrade to LXD version 4.0.12 or later, or 5.0.8 or later (from the CVE record's solution, Canonical Ltd.). Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (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)60 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 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

August 12, 2026

Last Modified

September 11, 2026

References (1)

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 11× in last 7d / 45× 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.

Showing the most recent 100 of 108 refreshes on record for this CVE.

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. None are among the latest 100 rows. The 8 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  2. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  3. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  4. 2026-10-12 16:31 UTCEG score recompute
  5. 2026-10-11 20:09 UTCEG score recompute
  6. 2026-10-11 17:22 UTCEG score recompute
  7. 2026-10-11 14:54 UTCEG score recompute
  8. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  9. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  10. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  11. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  12. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  13. 2026-10-07 02:34 UTCEG score recompute
  14. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  15. 2026-10-06 14:09 UTCEG score recompute
  16. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  17. 2026-10-05 14:44 UTCEG score recompute
  18. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  19. 2026-10-03 19:55 UTCEG score recompute
  20. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  21. 2026-10-02 21:58 UTCEG score recompute
  22. 2026-10-02 08:18 UTCEG score recompute
  23. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  24. 2026-09-30 21:53 UTCEG score recompute
  25. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.4% · 26th percentile
Show 75 more
  1. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  2. 2026-09-29 04:27 UTCEG score recompute
  3. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  4. 2026-09-28 01:16 UTCEG score recompute
  5. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  6. 2026-09-27 09:52 UTCEG score recompute
  7. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  8. 2026-09-25 03:39 UTCEG score recompute
  9. 2026-09-23 21:54 UTCEG score recompute
  10. 2026-09-22 21:05 UTCEG score recompute
  11. 2026-09-22 08:28 UTCEG score recompute
  12. 2026-09-21 06:22 UTCEG score recompute
  13. 2026-09-19 16:22 UTCEG score recompute
  14. 2026-09-19 02:58 UTCEG score recompute
  15. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  16. 2026-09-18 02:08 UTCEG score recompute
  17. 2026-09-17 00:16 UTCEG score recompute
  18. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  19. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  20. 2026-09-15 13:08 UTCEG score recompute
  21. 2026-09-13 20:14 UTCEG score recompute
  22. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  23. 2026-09-12 19:25 UTCEG score recompute
  24. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  25. 2026-09-11 18:35 UTCEG score recompute
  26. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  27. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  28. 2026-09-10 18:40 UTCEG score recompute
  29. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  30. 2026-09-09 05:11 UTCEG score recompute
  31. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  32. 2026-09-07 18:14 UTCEG score recompute
  33. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  34. 2026-09-06 15:28 UTCEG score recompute
  35. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  36. 2026-09-06 03:03 UTCEG score recompute
  37. 2026-09-05 02:14 UTCEG score recompute
  38. 2026-09-04 13:50 UTCEG score recompute
  39. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  40. 2026-09-02 23:26 UTCEG score recompute
  41. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  42. 2026-09-02 01:51 UTCEG score recompute
  43. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  44. 2026-09-01 13:13 UTCEG score recompute
  45. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  46. 2026-08-30 21:54 UTCEG score recompute
  47. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  48. 2026-08-30 09:30 UTCEG score recompute
  49. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  50. 2026-08-29 08:31 UTCEG score recompute
  51. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  52. 2026-08-28 01:06 UTCEG score recompute
  53. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  54. 2026-08-27 00:17 UTCEG score recompute
  55. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  56. 2026-08-25 23:25 UTCEG score recompute
  57. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  58. 2026-08-24 22:35 UTCEG score recompute
  59. 2026-08-24 10:11 UTCEG score recompute
  60. 2026-08-23 09:22 UTCEG score recompute
  61. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  62. 2026-08-22 08:34 UTCEG score recompute
  63. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  64. 2026-08-21 07:46 UTCEG score recompute
  65. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  66. 2026-08-19 18:33 UTCEG score recompute
  67. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  68. 2026-08-18 17:22 UTCEG score recompute
  69. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  70. 2026-08-17 16:33 UTCEG score recompute
  71. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  72. 2026-08-16 15:44 UTCEG score recompute
  73. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  74. 2026-08-16 03:20 UTCEG score recompute
  75. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 22nd percentile

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-16033?
CVE-2026-16033 is a high-severity vulnerability; its CVE record was published on August 12, 2026. A path traversal vulnerability in LXD allows an attacker to achieve arbitrary host file read or unconstrained file creation. When processing image metadata templates, LXD fails to properly sanitize or restrict template file paths from escaping the instance templates directory (specifically…
When was the CVE record for CVE-2026-16033 published?
The CVE record for CVE-2026-16033 was published on August 12, 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 September 11, 2026; the record at its source may have been updated since.
Is CVE-2026-16033 actively exploited?
CVE-2026-16033 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (27th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-16033?
CVE-2026-16033 has a CVSS base score of 8.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-16033?
The CVE record's solution for CVE-2026-16033, written by its CNA Canonical Ltd., names the fix: "Upgrade to LXD version 4.0.12 or later, or 5.0.8 or later."

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