Security readout for executives and security teams
Plain-English summary
Certain Spring MVC applications can produce corrupted Server-Sent Event streams. Exposure requires both the functional web framework and SSE on an affected Spring Framework release. The provided sources do not establish severity, business impact, or active exploitation, so organizations should promptly identify relevant services and follow Spring’s advisory.
Executive priority
Initiate prompt exposure assessment, but available evidence does not justify declaring an emergency. Prioritize systems matching the affected configuration, especially externally reachable services. Escalate if Spring publishes a high severity rating, concrete impact, exploitation evidence, or urgent remediation instructions.
Technical view
CVE-2026-59313 affects SSE handling in Spring MVC’s functional web framework across specified Spring Framework 5.3, 6.x, and 7.0 releases. The record classifies it as CWE-93. The supplied information does not explain the corruption trigger, attacker prerequisites, resulting security impact, fixed versions, or vendor-approved workarounds.
Likely exposure
Potentially exposed systems use Spring MVC functional routing with Server-Sent Events and run versions 7.0.0–7.0.8, 6.2.0–6.2.19, 6.1.0–6.1.28, 6.0.0–6.0.30, or 5.3.0–5.3.49. The sources do not establish exposure for other configurations or versions.
Exploitation context
The CVE is not listed as KEV in the supplied bundle, and no cited source reports active exploitation or a public exploit. This absence does not prove exploitation is impossible. The sources also omit attack prerequisites and whether corrupted streams can cross security boundaries.
Researcher notes
CWE-93 concerns CRLF sequence neutralization, but the bundle does not document the precise trigger or trust boundary. Avoid inferring request smuggling, code execution, data disclosure, or cross-user impact. Further analysis requires Spring’s technical details, affected execution path, reproducibility conditions, and corrected-release information.
Mitigation direction
- Inventory Spring MVC functional applications using SSE within the listed version ranges.
- Check Spring’s advisory for corrected releases or vendor-approved mitigations; the supplied bundle names no fixed version.
- Where operationally feasible, restrict affected SSE endpoints while remediation guidance is evaluated.
- Prioritize externally reachable and business-critical SSE services for assessment.
Validation and detection
- Record each application’s resolved Spring Framework version from dependency manifests or software inventories.
- Confirm whether applications use Spring MVC functional routing and emit Server-Sent Events.
- Review relevant monitoring for abnormal, malformed, or prematurely terminated SSE streams.
- After vendor-supported remediation, retest SSE framing and normal client behavior.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-93: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-59313 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://spring.io/security/cve-2026-59313CVE reference, vmware
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
CWE mapping pending import
This CVE carries a CWE mapping that will resolve to a full Glexia CWE intelligence page after the official CWE import is complete.