CVE-2026-86273

HIGHPre-NVD 7.37.3—
EchelonGraph scoreHIGH confidence

Score 7.3 from GitHub Security Advisory published 2026-09-07. a secondary CVSS source baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.3Exploit: Elevated riskExposed: 0

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

A weakness has been identified in projeto-siga siga up to 11.1.1. Affected by this issue is the function DownloadExterno.getUrl of the file sigaex/src/main/java/br/gov/jfrj/siga/vraptor/ExUtilController.java of the component HTML-to-PDF Endpoint. This manipulation of the argument html causes server-side request forgery. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

CVSS v3
7.3
EG Score
7.3(high)
EG Risk
64(Attend)
EG Risk 64/100SSVC: Attend

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
Severity73% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

September 7, 2026

Last Modified

September 11, 2026

Advisory Details (2)

Auto-updated Sep 7, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

GitHub - projeto-siga/siga: Repositório principal do projeto siga · GitHub

https://github.com/projeto-siga/siga/
generic🟡 PoC Available

Unauthenticated SSRF in public HTML-to-PDF endpoint · Issue #2492 · projeto-siga/siga · GitHub

https://github.com/projeto-siga/siga/issues/2492

Vendor Advisories for CVE-2026-86273(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 26× in last 7d / 58× 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. 2026-09-21 02:17 UTCEG score recompute
  2. 2026-09-21 02:16 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 13:21 UTCGHSA enrichment
  5. 2026-09-20 00:00 UTCEG score recompute
  6. 2026-09-20 00:00 UTCGHSA enrichment
  7. 2026-09-19 11:05 UTCGHSA enrichment
  8. 2026-09-18 22:11 UTCEG score recompute
  9. 2026-09-18 22:11 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 09:16 UTCGHSA enrichment
  12. 2026-09-17 20:21 UTCEG score recompute
  13. 2026-09-17 20:21 UTCGHSA enrichment
  14. 2026-09-17 19:32 UTCEPSS rescore
  15. 2026-09-17 07:16 UTCGHSA enrichment
  16. 2026-09-16 18:20 UTCEG score recompute
  17. 2026-09-16 18:20 UTCGHSA enrichment
  18. 2026-09-16 14:09 UTCEPSS rescore
  19. 2026-09-16 05:15 UTCEPSS rescore
  20. 2026-09-16 04:45 UTCGHSA enrichment
  21. 2026-09-15 15:50 UTCEG score recompute
  22. 2026-09-15 15:50 UTCGHSA enrichment
  23. 2026-09-15 03:12 UTCEPSS rescore
  24. 2026-09-15 03:12 UTCEPSS rescore
  25. 2026-09-15 02:54 UTCGHSA enrichment
Show 33 more
  1. 2026-09-14 13:59 UTCGHSA enrichment
  2. 2026-09-14 01:04 UTCEG score recompute
  3. 2026-09-14 01:04 UTCGHSA enrichment
  4. 2026-09-13 12:08 UTCGHSA enrichment
  5. 2026-09-12 23:13 UTCEG score recompute
  6. 2026-09-12 23:13 UTCGHSA enrichment
  7. 2026-09-12 10:18 UTCGHSA enrichment
  8. 2026-09-11 21:24 UTCEG score recompute
  9. 2026-09-11 21:24 UTCGHSA enrichment
  10. 2026-09-11 21:20 UTCNVD updateCVSS v4 → 5.5
  11. 2026-09-11 20:47 UTCEG score recompute
  12. 2026-09-11 20:47 UTCGHSA enrichment
  13. 2026-09-11 20:43 UTCMITRE cvelistV5CVSS v4 → 6.9
  14. 2026-09-11 20:09 UTCEG score recompute
  15. 2026-09-11 20:09 UTCGHSA enrichment
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-11 14:53 UTCEPSS rescore
  18. 2026-09-11 06:50 UTCGHSA enrichment
  19. 2026-09-10 17:55 UTCEG score recompute
  20. 2026-09-10 17:55 UTCGHSA enrichment
  21. 2026-09-10 05:00 UTCGHSA enrichment
  22. 2026-09-09 16:06 UTCGHSA enrichment
  23. 2026-09-09 02:54 UTCEG score recompute
  24. 2026-09-09 02:54 UTCGHSA enrichment
  25. 2026-09-08 22:01 UTCEPSS rescore
  26. 2026-09-08 14:00 UTCGHSA enrichment
  27. 2026-09-08 08:19 UTCGHSA enrichment
  28. 2026-09-07 19:23 UTCEG score recompute
  29. 2026-09-07 19:23 UTCGHSA enrichment
  30. 2026-09-07 06:28 UTCEG score recompute
  31. 2026-09-07 06:23 UTCNVD updateCVSS v4 → 5.5
  32. 2026-09-07 05:19 UTCEG score recompute
  33. 2026-09-07 05:16 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86273?
CVE-2026-86273 is a high vulnerability published on September 7, 2026. A weakness has been identified in projeto-siga siga up to 11.1.1. Affected by this issue is the function DownloadExterno.getUrl of the file sigaex/src/main/java/br/gov/jfrj/siga/vraptor/ExUtilController.java of the component HTML-to-PDF Endpoint. This manipulation of the argument html causes…
When was CVE-2026-86273 disclosed?
CVE-2026-86273 was first published in the National Vulnerability Database on September 7, 2026, with the most recent update on September 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86273 actively exploited?
CVE-2026-86273 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 78.4% of all scored CVEs.
What is the CVSS score of CVE-2026-86273?
CVE-2026-86273 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-86273?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86273, 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

Explore the affected products and dependency analysis for CVE-2026-86273

Explore →

Is Your Infrastructure Affected by CVE-2026-86273?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs