CVE-2026-90782

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 5.3 from GitHub Security Advisory published 2026-09-13. A secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Elevated

Also known asEUVD-2026-77009 (ENISA EUVD) · GHSA-wj27-rfm4-9hp4 (GitHub Security Advisories)Source: ENISA EUVD

5.3EG
EchelonGraph verdictPlan mitigationNo release containing the referenced fix is confirmed: check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 5.3Exploit: No code on recordExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

S2OPC through 1.7.3 contains a null pointer dereference in msg_subscription_publish_bs__alloc_notification_message_items() where a failed allocation for DataChangeNotification is overwritten by a successful allocation for EventNotificationList. Attackers can trigger heap allocation failures on sessions with both data-change and event notifications to cause the server process to terminate.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
40
EG Risk 40/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity53% × 45%
Impact severity (EG Severity): CVSS 5.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.
EPSS PROB
0.6%
EPSS %ILE
47th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (5.3): severity, escalated by confirmed exploitation. This CVE's 5.3 is its impact severity (EG Severity), not escalated.

EG Severity
5.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 13, 2026

Last Modified

September 23, 2026

Advisory Details (6)

Auto-updated Sep 13, 2026
Fix referenced — no release confirmed yet.
Web page

S2OPC through 1.7.3 NULL Pointer Dereference in alloc_notification_message_items() | Advisories | VulnCheck

https://www.vulncheck.com/advisories/s2opc-through-1.7.3-null-pointer-dereference-in-alloc-notification-message-items
Web page

Fix potential NULL dereferences (!1862) · Merge requests · Systerel / S2OPC · GitLab

https://gitlab.com/systerel/S2OPC/-/merge_requests/1862
Web page

Systerel / S2OPC · GitLab

https://gitlab.com/systerel/S2OPC
Web page

src/ClientServer/services/b2c/msg_subscription_publish_bs.c · S2OPC_Toolkit_1.7.3 · Systerel / S2OPC · GitLab

https://gitlab.com/systerel/S2OPC/-/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/services/b2c/msg_subscription_publish_bs.c#L106-L147
Web page

Ticket #1815: fix potential NULL dereferences (8848f051) · Commits · Systerel / S2OPC · GitLab

https://gitlab.com/systerel/S2OPC/-/commit/8848f051eed069b107ae7cb16a346d6f6386a8f5
Web page

NULL Pointer Dereference via Status-Variable Clobbering in Notification Message Allocation (#1815) · Issues · Systerel / S2OPC · GitLab

https://gitlab.com/systerel/S2OPC/-/issues/1815

Vendor Advisories for CVE-2026-90782(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 8× in last 7d / 52× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 110 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 11 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  2. 2026-11-01 16:36 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  3. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  4. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  5. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  6. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  7. 2026-10-27 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  8. 2026-10-27 11:55 UTCOSV refresh
  9. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  10. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  11. 2026-10-25 13:51 UTCEG score recompute
  12. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  13. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  14. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  15. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  16. 2026-10-20 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  17. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  18. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  19. 2026-10-18 03:00 UTCEG score recompute
  20. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  21. 2026-10-16 16:45 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  22. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  23. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  24. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  25. 2026-10-13 15:32 UTCEG score recompute
Show 74 more
  1. 2026-10-13 15:32 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  3. 2026-10-12 14:46 UTCEG score recompute
  4. 2026-10-11 19:14 UTCEG score recompute
  5. 2026-10-11 16:30 UTCEG score recompute
  6. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  7. 2026-10-11 13:45 UTCEG score recompute
  8. 2026-10-11 09:42 UTCEG score recompute
  9. 2026-10-11 09:41 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  11. 2026-10-10 05:15 UTCEG score recompute
  12. 2026-10-10 05:15 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  13. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  14. 2026-10-09 02:54 UTCEG score recompute
  15. 2026-10-09 02:53 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  16. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  17. 2026-10-08 00:33 UTCEG score recompute
  18. 2026-10-08 00:32 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  19. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  20. 2026-10-06 22:11 UTCEG score recompute
  21. 2026-10-06 22:11 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  22. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  23. 2026-10-05 19:50 UTCEG score recompute
  24. 2026-10-05 19:50 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  25. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  26. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  27. 2026-10-04 17:30 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  28. 2026-10-03 15:10 UTCEG score recompute
  29. 2026-10-03 15:10 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  30. 2026-10-02 12:45 UTCEG score recompute
  31. 2026-10-02 12:45 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  32. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  33. 2026-10-01 10:24 UTCEG score recompute
  34. 2026-10-01 10:24 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  35. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  36. 2026-09-30 08:04 UTCEG score recompute
  37. 2026-09-30 08:04 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  38. 2026-09-29 05:43 UTCEG score recompute
  39. 2026-09-29 05:43 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  40. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  41. 2026-09-28 03:23 UTCEG score recompute
  42. 2026-09-28 03:23 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  43. 2026-09-27 13:49 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  44. 2026-09-27 01:02 UTCEG score recompute
  45. 2026-09-27 01:02 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  46. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  47. 2026-09-25 22:41 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  48. 2026-09-24 19:43 UTCEG score recompute
  49. 2026-09-24 19:43 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  50. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  51. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  52. 2026-09-23 17:22 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  53. 2026-09-23 13:22 UTCEG score recompute
  54. 2026-09-23 13:22 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  55. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  56. 2026-09-22 11:01 UTCEG score recompute
  57. 2026-09-22 11:01 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  58. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  59. 2026-09-21 08:41 UTCEG score recompute
  60. 2026-09-21 08:40 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  61. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  62. 2026-09-20 06:17 UTCEG score recompute
  63. 2026-09-20 06:17 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  64. 2026-09-19 03:55 UTCEG score recompute
  65. 2026-09-19 03:55 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  66. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  67. 2026-09-18 01:35 UTCEG score recompute
  68. 2026-09-18 01:35 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  69. 2026-09-17 19:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  70. 2026-09-16 23:15 UTCEG score recompute
  71. 2026-09-16 23:15 UTCGHSA enrichmentGHSA-wj27-rfm4-9hp4 · GitHub CVSS 5.3
  72. 2026-09-16 14:09 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  73. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  74. 2026-09-15 20:54 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-90782?
CVE-2026-90782 is a medium-severity vulnerability; its CVE record was published on September 13, 2026. S2OPC through 1.7.3 contains a null pointer dereference in msg_subscription_publish_bs__alloc_notification_message_items() where a failed allocation for DataChangeNotification is overwritten by a successful allocation for EventNotificationList. Attackers can trigger heap allocation failures on…
When was CVE-2026-90782 made public?
CVE-2026-90782 was made public on August 16, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on September 13, 2026. EchelonGraph's copy of the record carries a last-modified date of September 23, 2026; the record at its source may have been updated since.
Is CVE-2026-90782 actively exploited?
CVE-2026-90782 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (47th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-90782?
CVE-2026-90782 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-90782?
A fix for CVE-2026-90782 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2026-90782 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-90782

Explore →

Is Your Infrastructure Affected by CVE-2026-90782?

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