CVE-2026-50567

HIGHPre-NVD 7.77.7
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (37th 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
7.7EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.25.0, Unarchive in pkg/utils/zip.go joined each archive entry name with the destination directory via filepath.Join and wrote the result without checking whether the resolved path stayed under the destination. A zip entry named ../../tmp/evil therefore landed at /tmp/evil. An attacker who could control a Package.Spec.Source.URL or Deployment.URL archive could induce the fetcher (running as the per-environment pod's fission-fetcher sidecar) to write files anywhere that process could reach: into other tenants' /packages// directories, into mounted secret/config volumes, or into the fetcher's own binary. This issue has been patched in version 1.25.0.

CVSS v3
7.7
EG Score
7.7HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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)
Severity77% × 45%
Impact severity (EG Severity): CVSS 7.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
37th
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 (7.7): severity, escalated by confirmed exploitation. This CVE's 7.7 is its impact severity (EG Severity), not escalated.

EG Severity
7.7 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). 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 every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (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

June 10, 2026

Last Modified

June 10, 2026

Advisory Details (3)

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

Zip Slip in pkg/utils/zip.go:Unarchive allows fetcher to write outside the destination directory · Advisory · fission/fission · GitHub

https://github.com/fission/fission/security/advisories/GHSA-q6vm-xqc9-v3ff
GitHub release Patch Available

v1.25.0

Patch available: fission/fission v1.25.0

https://github.com/fission/fission/releases/tag/v1.25.0
GitHub pull request

fix(utils): confine zip extraction with os.Root (zip-slip / CWE-22)

Fix merged in fission/fission PR #3444 on 2026-06-01 — awaiting tagged release

https://github.com/fission/fission/pull/3444

Vendor Advisories for CVE-2026-50567(1)

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

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/fission/fission—
  • every version up to 1.25.0: fixed in 1.25.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 33× 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 168 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 68 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

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

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Frequently asked(5)

What is CVE-2026-50567?
CVE-2026-50567 is a high-severity vulnerability; its CVE record was published on June 10, 2026. Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.25.0, Unarchive in pkg/utils/zip.go joined each archive entry name with the destination directory via filepath.Join and wrote the result…
When was the CVE record for CVE-2026-50567 published?
The CVE record for CVE-2026-50567 was published on June 10, 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 June 10, 2026; the record at its source may have been updated since.
Is CVE-2026-50567 actively exploited?
CVE-2026-50567 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-50567?
CVE-2026-50567 has a CVSS base score of 7.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-50567?
A fix for CVE-2026-50567 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-50567 are linked in the Vendor Advisories panel on this page.

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