CVE-2026-34917

MEDIUMPre-NVD 4.34.3
EchelonGraph scoreMEDIUM confidence

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

Score 4.3 from GitHub Security Advisory published 2026-06-23. A secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
4.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 4.3Exploit: None knownExposed services: Not assessed

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

The CVE record's CNA (HackerOne) lists Revive Adserver versions up to and including 6.0.6 as affected. No release containing a fix is confirmed on record.

Low‑privileged session IDs generated for the web admin console could be reused in the XML‑RPC API, whose authentication is normally restricted to admin users. An attacker could leverage this to gain unauthorised access and exploit API‑level vulnerabilities. The session context (web/API) is now recorded along with other session data, preventing session IDs from being used interchangeably.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
20
EG Risk 20/100

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 (value × EchelonGraph’s weight)
Severity43% × 45%
The EG Score, 4.3 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (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: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.4%
EPSS %ILE
30th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (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.

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

June 23, 2026

Last Modified

June 25, 2026

Advisory Details (1)

Auto-updated Jun 23, 2026
No fix on record yet.
Web page

HackerOne

https://hackerone.com/reports/3672641

Vendor Advisories for CVE-2026-34917(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 12× in last 7d / 32× 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 203 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 104 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  4. 2026-10-12 16:12 UTCEG score recompute
  5. 2026-10-11 19:54 UTCEG score recompute
  6. 2026-10-11 17:07 UTCEG score recompute
  7. 2026-10-11 14:34 UTCEG score recompute
  8. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  11. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  12. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  13. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  14. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  15. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  16. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  17. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  18. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  19. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  20. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  21. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  22. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  23. 2026-09-23 12:01 UTCEG score recompute
  24. 2026-09-23 12:01 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  25. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 31st percentile
Show 74 more
  1. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  2. 2026-09-18 10:28 UTCEG score recompute
  3. 2026-09-18 10:28 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  4. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  5. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  6. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  7. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  8. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  9. 2026-09-13 12:22 UTCEG score recompute
  10. 2026-09-13 12:22 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  11. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  12. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  13. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  14. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  15. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  16. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  17. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  18. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  19. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  20. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  21. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  22. 2026-08-30 20:26 UTCEG score recompute
  23. 2026-08-30 20:26 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  24. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  25. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  26. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  27. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  28. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  29. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  30. 2026-08-24 13:54 UTCEG score recompute
  31. 2026-08-24 13:54 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  32. 2026-08-23 12:48 UTCEG score recompute
  33. 2026-08-23 12:48 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  34. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  35. 2026-08-22 13:54 UTCEG score recompute
  36. 2026-08-22 13:54 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  37. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  38. 2026-08-21 06:40 UTCEG score recompute
  39. 2026-08-21 06:40 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  40. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  41. 2026-08-20 07:46 UTCEG score recompute
  42. 2026-08-20 07:46 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  43. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  44. 2026-08-19 04:49 UTCEG score recompute
  45. 2026-08-19 04:49 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  46. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  47. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  48. 2026-08-17 09:41 UTCEG score recompute
  49. 2026-08-17 09:41 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  50. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  51. 2026-08-16 10:48 UTCEG score recompute
  52. 2026-08-16 10:48 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  53. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  54. 2026-08-15 11:55 UTCEG score recompute
  55. 2026-08-15 11:55 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  56. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  57. 2026-08-14 13:02 UTCEG score recompute
  58. 2026-08-14 13:02 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  59. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  60. 2026-08-13 14:08 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  61. 2026-08-12 15:12 UTCEG score recompute
  62. 2026-08-12 15:12 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  63. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  64. 2026-08-11 16:19 UTCEG score recompute
  65. 2026-08-11 16:19 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  66. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  67. 2026-08-10 17:24 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  68. 2026-08-09 18:24 UTCEG score recompute
  69. 2026-08-09 18:24 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  70. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  71. 2026-08-08 19:31 UTCEG score recompute
  72. 2026-08-08 19:31 UTCGHSA enrichmentGHSA-hmrw-59p6-9fgx · GitHub CVSS 4.3
  73. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  74. 2026-08-07 20:38 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-34917?
CVE-2026-34917 is a medium-severity vulnerability; its CVE record was published on June 23, 2026. Low‑privileged session IDs generated for the web admin console could be reused in the XML‑RPC API, whose authentication is normally restricted to admin users. An attacker could leverage this to gain unauthorised access and exploit API‑level vulnerabilities. The session context (web/API) is now…
When was the CVE record for CVE-2026-34917 published?
The CVE record for CVE-2026-34917 was published on June 23, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of June 25, 2026; the record at its source may have been updated since.
Is CVE-2026-34917 actively exploited?
CVE-2026-34917 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (30th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-34917?
CVE-2026-34917 has a CVSS base score of 4.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-34917?
No fix for CVE-2026-34917 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The CVE record's CNA (HackerOne) lists Revive Adserver versions up to and including 6.0.6 as affected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-34917 are linked in the Vendor Advisories panel on this page.

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