CVE-2026-59313

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-27. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

Spring MVC applications using the functional web framework are vulnerable to stream corruption when using Server-Sent Events (SSE). Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19 Spring Framework 6.1.0 - 6.1.28 Spring Framework 6.0.0 - 6.0.30 Spring Framework 5.3.0 - 5.3.49

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

August 27, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Aug 28, 2026
No patch confirmed yet.
generic

Server Sent Event stream corruption in Spring MVC functional web framework

https://spring.io/security/cve-2026-59313

Vendor Advisories for CVE-2026-59313(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 19× 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. 2026-08-30 02:59 UTCEG score recompute
  2. 2026-08-30 02:59 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-29 22:59 UTCGHSA enrichment
  5. 2026-08-29 18:58 UTCGHSA enrichment
  6. 2026-08-29 14:55 UTCGHSA enrichment
  7. 2026-08-29 10:55 UTCGHSA enrichment
  8. 2026-08-29 06:53 UTCGHSA enrichment
  9. 2026-08-29 02:52 UTCEG score recompute
  10. 2026-08-29 02:51 UTCGHSA enrichment
  11. 2026-08-28 22:50 UTCGHSA enrichment
  12. 2026-08-28 22:04 UTCEG score recompute▲ 9.80
  13. 2026-08-28 22:03 UTCGHSA enrichment
  14. 2026-08-28 21:59 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  15. 2026-08-28 21:42 UTCEPSS rescore
  16. 2026-08-28 18:59 UTCGHSA enrichment
  17. 2026-08-27 20:26 UTCNVD update
  18. 2026-08-27 20:16 UTCEG score recompute
  19. 2026-08-27 20:13 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-59313?
CVE-2026-59313 is a critical vulnerability published on August 27, 2026. Spring MVC applications using the functional web framework are vulnerable to stream corruption when using Server-Sent Events (SSE). Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19 Spring Framework 6.1.0 - 6.1.28 Spring Framework 6.0.0 - 6.0.30 Spring Framework 5.3.0 - 5.3.49
When was CVE-2026-59313 disclosed?
CVE-2026-59313 was first published in the National Vulnerability Database on August 27, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59313 actively exploited?
CVE-2026-59313 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 68.4% of all scored CVEs.
What is the CVSS score of CVE-2026-59313?
CVE-2026-59313 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-59313?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59313, 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

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