CVE-2026-90513

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-09-13. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: 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 simalexan api-lambda-send-email-ses up to bda6869aa81371d1e872242e74fe7d953edb818d. This issue affects the function SES.sendEmail of the file template.yml of the component API Gateway Endpoint. This manipulation of the argument toEmails/ccEmails/replyToEmails/subject/message causes missing authentication. It is possible to initiate the attack remotely. This product is using a rolling release to provide continious delivery. Therefore, no version details for affected nor updated releases are available. The project was informed of the problem early through an issue report but has not responded yet.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
38%
KEV
Not listed

Published

September 13, 2026

Last Modified

September 14, 2026

Advisory Details (2)

Auto-updated Sep 13, 2026
No patch confirmed yet.
generic

GitHub - simalexan/api-lambda-send-email-ses: API and a Lambda Function for sending emails · GitHub

https://github.com/simalexan/api-lambda-send-email-ses/
generic

Unauthenticated API Gateway endpoint can trigger Lambda SES email sending chain · Issue #9 · simalexan/api-lambda-send-email-ses · GitHub

https://github.com/simalexan/api-lambda-send-email-ses/issues/9

Vendor Advisories for CVE-2026-90513(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 25× in last 7d / 28× 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 22:06 UTCEG score recompute
  2. 2026-09-20 22:06 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-19 21:56 UTCEG score recompute
  5. 2026-09-19 21:56 UTCGHSA enrichment
  6. 2026-09-18 21:47 UTCEG score recompute
  7. 2026-09-18 21:47 UTCGHSA enrichment
  8. 2026-09-18 19:28 UTCEPSS rescore
  9. 2026-09-17 21:38 UTCEG score recompute
  10. 2026-09-17 21:38 UTCGHSA enrichment
  11. 2026-09-17 19:32 UTCEPSS rescore
  12. 2026-09-16 21:28 UTCEG score recompute
  13. 2026-09-16 21:28 UTCGHSA enrichment
  14. 2026-09-16 14:09 UTCEPSS rescore
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-15 21:17 UTCEG score recompute
  17. 2026-09-15 21:17 UTCGHSA enrichment
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-14 21:07 UTCGHSA enrichment
  20. 2026-09-14 17:28 UTCEG score recompute
  21. 2026-09-14 17:28 UTCGHSA enrichment
  22. 2026-09-14 16:36 UTCEG score recompute
  23. 2026-09-14 16:35 UTCGHSA enrichment
  24. 2026-09-14 11:30 UTCEG score recompute
  25. 2026-09-14 11:30 UTCGHSA enrichment
Show 3 more
  1. 2026-09-13 11:21 UTCEG score recompute
  2. 2026-09-13 10:50 UTCEG score recompute
  3. 2026-09-13 10:49 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-90513?
CVE-2026-90513 is a medium vulnerability published on September 13, 2026. A flaw has been found in simalexan api-lambda-send-email-ses up to bda6869aa81371d1e872242e74fe7d953edb818d. This issue affects the function SES.sendEmail of the file template.yml of the component API Gateway Endpoint. This manipulation of the argument…
When was CVE-2026-90513 disclosed?
CVE-2026-90513 was first published in the National Vulnerability Database on September 13, 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-2026-90513 actively exploited?
CVE-2026-90513 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 62.4% of all scored CVEs.
What is the CVSS score of CVE-2026-90513?
CVE-2026-90513 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-90513?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-90513, 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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