CVE-2026-88012

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 77% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

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

Traefik is an open source HTTP reverse proxy and load balancer. From 2.8.2 until 2.11.56 and 3.7.12, HTTP/3 entrypoints do not apply entryPoints..transport.respondingTimeouts.readTimeout because the timeout is enforced on a TCP connection and the HTTP/3 server has no corresponding QUIC stream deadline. An unauthenticated client can use a slow request body, trickling data indefinitely while holding a request and an upstream connection open and exhausting backends with bounded connection pools. This issue is fixed in 2.11.56 and 3.7.12.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: Track

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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
23%
KEV
Not listed

Published

September 10, 2026

Last Modified

September 14, 2026

Advisory Details (5)

Auto-updated Sep 10, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

v3.7.12

Patch available: traefik/traefik v3.7.12

https://github.com/traefik/traefik/releases/tag/v3.7.12
github_release Patch Available

v2.11.56

Patch available: traefik/traefik v2.11.56

https://github.com/traefik/traefik/releases/tag/v2.11.56
github_commit

commit a8d0bc425859 (traefik/traefik)

Fix landed in traefik/traefik commit a8d0bc425859 — awaiting tagged release

https://github.com/traefik/traefik/commit/a8d0bc425859dde7481a6c9a324e610b81d754d0
github_pr

Apply read timeout, idle timeout, and max header bytes for HTTP/3

Fix merged in traefik/traefik PR #13717 on 2026-08-24 — awaiting tagged release

https://github.com/traefik/traefik/pull/13717
github Patch Available🟡 PoC Available

respondingTimeouts.readTimeout is not applied to HTTP/3, leaving slow-body uploads unbounded · Advisory · traefik/traefik · GitHub

https://github.com/traefik/traefik/security/advisories/GHSA-7ghq-v6jf-g56c

Vendor Advisories for CVE-2026-88012(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 1 ecosystem)
Go(2)
PackageVulnerable rangeFixed inDependents
github.com/traefik/traefik/v2—2.11.56—
github.com/traefik/traefik/v3—3.7.12—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 22× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-19 17:24 UTCEG score recompute
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-17 19:47 UTCEG score recompute
  5. 2026-09-17 19:32 UTCEPSS rescore
  6. 2026-09-16 18:09 UTCEG score recompute
  7. 2026-09-16 14:09 UTCEPSS rescore
  8. 2026-09-16 05:15 UTCEPSS rescore
  9. 2026-09-15 19:03 UTCEG score recompute
  10. 2026-09-15 03:12 UTCEPSS rescore
  11. 2026-09-13 19:00 UTCEG score recompute
  12. 2026-09-13 16:48 UTCEPSS rescore
  13. 2026-09-12 20:12 UTCEG score recompute
  14. 2026-09-12 15:02 UTCEPSS rescore
  15. 2026-09-11 21:23 UTCEG score recompute
  16. 2026-09-11 20:47 UTCEG score recompute
  17. 2026-09-11 18:48 UTCEG score recompute
  18. 2026-09-11 14:53 UTCEPSS rescore
  19. 2026-09-11 14:53 UTCEPSS rescore
  20. 2026-09-10 16:20 UTCEG score recompute
  21. 2026-09-10 15:40 UTCEG score recompute
  22. 2026-09-10 15:39 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-88012?
CVE-2026-88012 is a medium vulnerability published on September 10, 2026. Traefik is an open source HTTP reverse proxy and load balancer. From 2.8.2 until 2.11.56 and 3.7.12, HTTP/3 entrypoints do not apply entryPoints..transport.respondingTimeouts.readTimeout because the timeout is enforced on a TCP connection and the HTTP/3 server has no corresponding QUIC stream…
When was CVE-2026-88012 disclosed?
CVE-2026-88012 was first published in the National Vulnerability Database on September 10, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-88012 actively exploited?
CVE-2026-88012 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 77.4% of all scored CVEs.
What is the CVSS score of CVE-2026-88012?
CVE-2026-88012 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-88012?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-88012, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-88012

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