CVE-2026-91765

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (41st percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

cleanup_xml_node() in the SOAP XML parser recurses once per XML nesting level with no depth limit. An unauthenticated attacker can post a SOAP request containing tens of thousands of nested elements to any SoapServer endpoint, exhaust the stack and crash the process. The same unbounded recursion exists in the SOAP value decoder and in the WSDL node search helper.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100CISA SSVC

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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
41st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 25, 2026

Last Modified

September 29, 2026

Advisory Details (1)

Auto-updated Sep 25, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

SOAP: Unbounded Recursion in Server-Side cleanup_xml_node · Advisory · php/php-src · GitHub

https://github.com/php/php-src/security/advisories/GHSA-rgrp-mwpx-f6rm

Vendor Advisories for CVE-2026-91765(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatphp-main-8.5.11-2.hum12026-09-23redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 28× in last 7d / 36× 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. 2026-10-04 05:35 UTCVendor advisory
  2. 2026-10-03 16:41 UTCEG score recompute
  3. 2026-10-03 16:41 UTCVendor advisory
  4. 2026-10-03 03:48 UTCEG score recompute
  5. 2026-10-03 03:48 UTCVendor advisory
  6. 2026-10-02 14:55 UTCVendor advisory
  7. 2026-10-02 02:01 UTCEG score recompute
  8. 2026-10-02 02:01 UTCVendor advisory
  9. 2026-10-01 19:51 UTCEPSS rescore
  10. 2026-10-01 13:08 UTCVendor advisory
  11. 2026-10-01 00:15 UTCEG score recompute
  12. 2026-10-01 00:15 UTCVendor advisory
  13. 2026-09-30 15:04 UTCEPSS rescore
  14. 2026-09-30 11:10 UTCVendor advisory
  15. 2026-09-29 22:16 UTCVendor advisory
  16. 2026-09-29 16:14 UTCEG score recompute
  17. 2026-09-29 16:14 UTCVendor advisory
  18. 2026-09-29 03:20 UTCEG score recompute
  19. 2026-09-29 03:20 UTCVendor advisory
  20. 2026-09-28 14:26 UTCEG score recompute
  21. 2026-09-28 14:26 UTCVendor advisory
  22. 2026-09-28 13:52 UTCEPSS rescore
  23. 2026-09-28 13:52 UTCEPSS rescore
  24. 2026-09-28 13:44 UTCEG score recompute
  25. 2026-09-28 13:44 UTCVendor advisory
Show 11 more
  1. 2026-09-28 00:55 UTCEG score recompute
  2. 2026-09-28 00:55 UTCVendor advisory
  3. 2026-09-27 13:49 UTCEPSS rescore
  4. 2026-09-27 12:02 UTCVendor advisory
  5. 2026-09-26 23:09 UTCEG score recompute
  6. 2026-09-26 23:09 UTCVendor advisory
  7. 2026-09-26 15:59 UTCEPSS rescore
  8. 2026-09-26 10:13 UTCVendor advisory
  9. 2026-09-25 21:19 UTCEG score recompute
  10. 2026-09-25 20:46 UTCEG score recompute
  11. 2026-09-25 20:44 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-91765?
CVE-2026-91765 is a high vulnerability published on September 25, 2026. cleanupxmlnode() in the SOAP XML parser recurses once per XML nesting level with no depth limit. An unauthenticated attacker can post a SOAP request containing tens of thousands of nested elements to any SoapServer endpoint, exhaust the stack and crash the process. The same unbounded recursion…
When was CVE-2026-91765 disclosed?
CVE-2026-91765 was first published on September 25, 2026, with the most recent update on September 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-91765 actively exploited?
CVE-2026-91765 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (41st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-91765?
CVE-2026-91765 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-91765?
A fix for CVE-2026-91765 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-91765 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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