CVE-2026-53716

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7% (53rd 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-2026-78079 (ENISA EUVD) · GHSA-cxpq-8v7q-cg56 (GitHub Security Advisories)Source: ENISA EUVD

6.5EG
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: 0.7%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. Prior to 1.7.4 and 1.8.1, getFileFromGZ in internal/wasm/httpfetcher.go calls io.ReadAll on a gzip.Reader without limiting decompressed output when a tenant-controlled EnvoyExtensionPolicy.spec.wasm[].code.http.url points to a reachable compressed Wasm payload. The 256 MiB compressed-input cap does not constrain the expanded size, no operator Wasm URL allowlist exists, and the optional sha256 check occurs only after decompression, so a comparatively small gzip stream can force a multi-gigabyte allocation in the shared controller. The resulting out-of-memory termination restarts the controller, re-reconciles the persistent custom resource, and can create a persistent cross-tenant control-plane outage. This issue is fixed in versions 1.7.4 and 1.8.1.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
30
EG Risk 30/100

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)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.7% × 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
0.7%
EPSS %ILE
53rd
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 (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 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
0.7% 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 16, 2026

Last Modified

September 30, 2026

Advisory Details (9)

Auto-updated Sep 14, 2026
Patch available. Sources: github_pr, github_commit, github_release, github.
GitHub release Patch Available

v1.8.1

Patch available: envoyproxy/gateway v1.8.1

https://github.com/envoyproxy/gateway/releases/tag/v1.8.1
GitHub release Patch Available

v1.7.4

Patch available: envoyproxy/gateway v1.7.4

https://github.com/envoyproxy/gateway/releases/tag/v1.7.4
GitHub commit

commit b4737180c7e5 (envoyproxy/gateway)

Fix landed in envoyproxy/gateway commit b4737180c7e5 — awaiting tagged release

https://github.com/envoyproxy/gateway/commit/b4737180c7e597490c6363075c565fa8cf24eead
GitHub commit

commit 96e2b750868a (envoyproxy/gateway)

Fix landed in envoyproxy/gateway commit 96e2b750868a — awaiting tagged release

https://github.com/envoyproxy/gateway/commit/96e2b750868a459ace4b8b68e6a6e4fb0152b9b7
GitHub commit

commit 5a78db82b7cf (envoyproxy/gateway)

Fix landed in envoyproxy/gateway commit 5a78db82b7cf — awaiting tagged release

https://github.com/envoyproxy/gateway/commit/5a78db82b7cf4fc5bebbeda2c50952892038a464
GitHub pull request

fix github SA for June release

Fix merged in envoyproxy/gateway PR #9173 on 2026-06-05 — awaiting tagged release

https://github.com/envoyproxy/gateway/pull/9173
GitHub pull request

[release-1.8] fix github SA for June release

Fix merged in envoyproxy/gateway PR #9172 on 2026-06-05 — awaiting tagged release

https://github.com/envoyproxy/gateway/pull/9172
GitHub pull request

[release-1.7] fix github SA for June release

Fix merged in envoyproxy/gateway PR #9171 on 2026-06-05 — awaiting tagged release

https://github.com/envoyproxy/gateway/pull/9171
GitHub advisoryMentions a patch (unverified)

Wasm HTTP fetch decompresses gzip without output-size limit · Advisory · envoyproxy/gateway · GitHub

https://github.com/envoyproxy/gateway/security/advisories/GHSA-cxpq-8v7q-cg56

Vendor Advisories for CVE-2026-53716(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/envoyproxy/gateway—
  • 1.8.0-rc.0 up to 1.8.1: fixed in 1.8.1
  • every version up to 1.7.4: fixed in 1.7.4
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 38× 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 0.7% · 53rd percentile
  2. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  3. 2026-10-25 14:20 UTCEG score recompute
  4. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  5. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  6. 2026-10-22 21:47 UTCEG score recompute
  7. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  8. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  9. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  10. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  11. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  12. 2026-10-18 03:31 UTCEG score recompute
  13. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  14. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  15. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  16. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  17. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  18. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  19. 2026-10-12 15:57 UTCEG score recompute
  20. 2026-10-11 19:40 UTCEG score recompute
  21. 2026-10-11 16:55 UTCEG score recompute
  22. 2026-10-11 14:18 UTCEG score recompute
  23. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  24. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  25. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
Show 31 more
  1. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  2. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  3. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  4. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  5. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  6. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  7. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  8. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  9. 2026-09-30 17:52 UTCEG score recompute
  10. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  11. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  12. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  13. 2026-09-28 08:16 UTCEG score recompute
  14. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  15. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  16. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  17. 2026-09-24 07:00 UTCEG score recompute
  18. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  19. 2026-09-23 03:01 UTCEG score recompute
  20. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  21. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  22. 2026-09-18 04:38 UTCEG score recompute
  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 0.7% · 50th percentile
  26. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  27. 2026-09-14 21:33 UTCEG score recompute
  28. 2026-07-30 14:46 UTCEG score recompute
  29. 2026-07-26 11:25 UTCEG score recompute
  30. 2026-07-23 03:19 UTCEG score recompute
  31. 2026-07-16 20:05 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-53716?
CVE-2026-53716 is a medium-severity vulnerability; its CVE record was published on July 16, 2026. Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. Prior to 1.7.4 and 1.8.1, getFileFromGZ in internal/wasm/httpfetcher.go calls io.ReadAll on a gzip.Reader without limiting decompressed output when a tenant-controlled…
When was the CVE record for CVE-2026-53716 published?
The CVE record for CVE-2026-53716 was published on July 16, 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 30, 2026; the record at its source may have been updated since.
Is CVE-2026-53716 actively exploited?
CVE-2026-53716 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (53rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-53716?
CVE-2026-53716 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-53716?
A fix for CVE-2026-53716 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-53716 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-53716

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