CVE-2026-54247

MEDIUMPre-NVD 4.34.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 4.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (22nd 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

Also known asEUVD-2026-78062 (ENISA EUVD) · GHSA-cwxq-rc9x-2jvv (GitHub Security Advisories)Source: ENISA EUVD

4.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 4.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Skipper is an HTTP router and reverse proxy for service composition. Prior to 0.26.22, Handler in dataclients/kubernetes/admission/admission.go passes the body of requests to the Kubernetes admission endpoint at :9443/admission directly to io.ReadAll(r.Body) without a size limit. An attacker with in-cluster network access and a valid Kubernetes client certificate can send a very large body that causes unbounded memory allocation and an out-of-memory termination of the Skipper process. The disruption is limited to Ingress and RouteGroup admission rather than pod creation or unrelated admission controllers, and Kubernetes normally restarts the process. This issue is fixed in version 0.26.22.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
19
EG Risk 19/100

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)
Severity43% × 45%
Impact severity (EG Severity): CVSS 4.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 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
0.3%
EPSS %ILE
22nd
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 (4.3): severity, escalated by confirmed exploitation. This CVE's 4.3 is its impact severity (EG Severity), not escalated.

EG Severity
4.3 MEDIUMCVSS-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
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). 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

July 17, 2026

Last Modified

September 16, 2026

Advisory Details (4)

Auto-updated Sep 14, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
GitHub advisoryMentions a patch (unverified)

Unbounded Request Body Read in Admission Webhook Causes Memory Exhaustion DoS · Advisory · zalando/skipper · GitHub

https://github.com/zalando/skipper/security/advisories/GHSA-cwxq-rc9x-2jvv
GitHub release Patch Available

v0.26.22

Patch available: zalando/skipper v0.26.22

https://github.com/zalando/skipper/releases/tag/v0.26.22
GitHub pull request

fix: unbounded read of consuming the http.Body in the validation webhook

Fix merged in zalando/skipper PR #4053 on 2026-06-05 — awaiting tagged release

https://github.com/zalando/skipper/pull/4053
GitHub commit

commit c3d156c6caae (zalando/skipper)

Fix landed in zalando/skipper commit c3d156c6caae — awaiting tagged release

https://github.com/zalando/skipper/commit/c3d156c6caaefecc9a46774c0f9c3c70b97160b4

Vendor Advisories for CVE-2026-54247(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/zalando/skipper—
  • every version up to 0.26.22: fixed in 0.26.22
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 37× 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.

  1. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  2. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  3. 2026-10-25 14:19 UTCEG score recompute
  4. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  5. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  6. 2026-10-22 21:23 UTCEG score recompute
  7. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  8. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  9. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  10. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  11. 2026-10-18 03:31 UTCEG score recompute
  12. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  13. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  14. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  15. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  16. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  17. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  18. 2026-10-12 15:56 UTCEG score recompute
  19. 2026-10-11 19:39 UTCEG score recompute
  20. 2026-10-11 16:55 UTCEG score recompute
  21. 2026-10-11 14:18 UTCEG score recompute
  22. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  23. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  24. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  25. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 20th percentile
Show 32 more
  1. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  2. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  3. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  4. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  5. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  6. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  7. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  8. 2026-10-01 10:28 UTCEG score recompute
  9. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  10. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  11. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  12. 2026-09-28 07:52 UTCEG score recompute
  13. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  14. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  15. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  16. 2026-09-24 04:41 UTCEG score recompute
  17. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  18. 2026-09-23 02:25 UTCEG score recompute
  19. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  20. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  21. 2026-09-18 04:32 UTCEG score recompute
  22. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  23. 2026-09-16 17:52 UTCEG score recompute
  24. 2026-09-16 17:11 UTCEG score recompute
  25. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  26. 2026-09-16 13:47 UTCEG score recompute
  27. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  28. 2026-09-14 20:27 UTCEG score recompute
  29. 2026-07-30 22:30 UTCEG score recompute
  30. 2026-07-26 11:18 UTCEG score recompute
  31. 2026-07-23 03:19 UTCEG score recompute
  32. 2026-07-17 19:00 UTCEG score recompute

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-54247?
CVE-2026-54247 is a medium-severity vulnerability; its CVE record was published on July 17, 2026. Skipper is an HTTP router and reverse proxy for service composition. Prior to 0.26.22, Handler in dataclients/kubernetes/admission/admission.go passes the body of requests to the Kubernetes admission endpoint at :9443/admission directly to io.ReadAll(r.Body) without a size limit. An attacker with…
When was the CVE record for CVE-2026-54247 published?
The CVE record for CVE-2026-54247 was published on July 17, 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 16, 2026; the record at its source may have been updated since.
Is CVE-2026-54247 actively exploited?
CVE-2026-54247 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (22nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54247?
CVE-2026-54247 has a CVSS base score of 4.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-54247?
A fix for CVE-2026-54247 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-54247 are linked in the Vendor Advisories panel on this page.

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