CVE-2026-92363

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-09-16. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 4.3Exploit: None knownExposed: 0

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

A flaw has been found in ag-ui-protocol ag-ui 1.0. Affected is an unknown function of the file src/stream/sse_parser.cpp of the component JSON Parser. Executing a manipulation can lead to resource consumption. The attack may be performed from remote. This patch is called ab6e0bc298996caac2b4b0b3ec0bd8d32a15a186. Applying a patch is advised to resolve this issue.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
20(Track)
EG Risk 20/100SSVC: 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
Severity43% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

September 16, 2026

Last Modified

September 18, 2026

Advisory Details (4)

Auto-updated Sep 16, 2026
Patch available. Sources: github_pr, github_commit.
generic

GitHub - ag-ui-protocol/ag-ui: AG-UI: the Agent-User Interaction Protocol. Bring Agents into Frontend Applications. · GitHub

https://github.com/ag-ui-protocol/ag-ui/
github_commit Patch Available

commit ab6e0bc29899 (ag-ui-protocol/ag-ui)

Patch available: ag-ui-protocol/ag-ui release/2026-08-27 (contains commit ab6e0bc29899)

https://github.com/ag-ui-protocol/ag-ui/commit/ab6e0bc298996caac2b4b0b3ec0bd8d32a15a186
github_pr Patch Available

fix(c++): count the per-event accumulator against the SSE buffer cap

Patch available: ag-ui-protocol/ag-ui release/2026-08-27 (PR #2501 merged 2026-08-25)

https://github.com/ag-ui-protocol/ag-ui/pull/2501
generic

[BUG]: C++ community SDK: per-event accumulator bypasses the chunk cap; JSON parsing has no depth limit · Issue #2440 · ag-ui-protocol/ag-ui · GitHub

https://github.com/ag-ui-protocol/ag-ui/issues/2440

Vendor Advisories for CVE-2026-92363(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 14× 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. 2026-09-19 19:27 UTCEG score recompute
  2. 2026-09-19 19:27 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 18:32 UTCEG score recompute
  5. 2026-09-18 18:32 UTCGHSA enrichment
  6. 2026-09-18 17:54 UTCEG score recompute
  7. 2026-09-18 17:54 UTCGHSA enrichment
  8. 2026-09-17 19:32 UTCEPSS rescore
  9. 2026-09-17 19:12 UTCGHSA enrichment
  10. 2026-09-16 18:04 UTCEG score recompute
  11. 2026-09-16 18:03 UTCGHSA enrichment
  12. 2026-09-16 14:24 UTCEG score recompute
  13. 2026-09-16 13:38 UTCEG score recompute
  14. 2026-09-16 13:35 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-92363?
CVE-2026-92363 is a medium vulnerability published on September 16, 2026. A flaw has been found in ag-ui-protocol ag-ui 1.0. Affected is an unknown function of the file src/stream/sse_parser.cpp of the component JSON Parser. Executing a manipulation can lead to resource consumption. The attack may be performed from remote. This patch is called…
When was CVE-2026-92363 disclosed?
CVE-2026-92363 was first published in the National Vulnerability Database on September 16, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-92363 actively exploited?
CVE-2026-92363 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 56.7% of all scored CVEs.
What is the CVSS score of CVE-2026-92363?
CVE-2026-92363 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-92363?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-92363, 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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