CVE-2026-53497

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (31st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated
5.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (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: 0.4%CVSS: 5.3Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

CrossWatch (CW) is a synchronization engine. Prior to version 0.9.21, GET /api/app-auth/status is accessible without authentication and returns the other_sessions array, which exposes metadata of all active sessions — including originating IP addresses, User-Agent strings, internal session IDs, and creation/expiry timestamps. Any unauthenticated network attacker can enumerate this data without credentials. Version 0.9.21 fixes the issue.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
55
EG Risk 55/100

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)
Severity53% × 45%
The EG Score, 5.3 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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 available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
31st
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track 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 public PoC (CISA Vulnrichment) · Automatable yes (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)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (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

August 21, 2026

Last Modified

October 12, 2026

Advisory Details (2)

Auto-updated Aug 21, 2026
Patch available. Sources: github, github_release.
GitHub release Patch Available

Update 0.9.21

Patch available: cenodude/CrossWatch v0.9.21

https://github.com/cenodude/CrossWatch/releases/tag/v0.9.21
GitHub advisoryMentions a patch (unverified)

Unauthenticated /api/app-auth/status endpoint leaks active session metadata (IP, User-Agent, session IDs) · Advisory · cenodude/CrossWatch · GitHub

https://github.com/cenodude/CrossWatch/security/advisories/GHSA-rv3j-r4h5-q3cj

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 51× 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.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  3. 2026-10-12 15:57 UTCEG score recompute
  4. 2026-10-11 19:40 UTCEG score recompute
  5. 2026-10-11 16:55 UTCEG score recompute
  6. 2026-10-11 14:19 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  10. 2026-10-09 05:39 UTCEG score recompute
  11. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  12. 2026-10-08 04:50 UTCEG score recompute
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  14. 2026-10-07 01:14 UTCEG score recompute
  15. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  16. 2026-10-06 03:03 UTCEG score recompute
  17. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  18. 2026-10-05 01:31 UTCEG score recompute
  19. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  20. 2026-10-04 02:29 UTCEG score recompute
  21. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  22. 2026-10-03 01:35 UTCEG score recompute
  23. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  24. 2026-10-02 03:40 UTCEG score recompute
  25. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 31st percentile
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  1. 2026-10-01 05:39 UTCEG score recompute
  2. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  3. 2026-09-30 07:48 UTCEG score recompute
  4. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  5. 2026-09-28 21:55 UTCEG score recompute
  6. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  7. 2026-09-28 00:09 UTCEG score recompute
  8. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  9. 2026-09-27 02:23 UTCEG score recompute
  10. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  11. 2026-09-25 08:58 UTCEG score recompute
  12. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  13. 2026-09-24 11:11 UTCEG score recompute
  14. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  15. 2026-09-22 15:33 UTCEG score recompute
  16. 2026-09-21 17:47 UTCEG score recompute
  17. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  18. 2026-09-19 21:29 UTCEG score recompute
  19. 2026-09-18 23:42 UTCEG score recompute
  20. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  21. 2026-09-18 01:56 UTCEG score recompute
  22. 2026-09-17 04:10 UTCEG score recompute
  23. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  24. 2026-09-16 06:23 UTCEG score recompute
  25. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  26. 2026-09-15 08:37 UTCEG score recompute
  27. 2026-09-14 10:51 UTCEG score recompute
  28. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  29. 2026-09-12 15:19 UTCEG score recompute
  30. 2026-09-11 17:33 UTCEG score recompute
  31. 2026-09-10 19:06 UTCEG score recompute
  32. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  33. 2026-09-09 01:44 UTCEG score recompute
  34. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  35. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  36. 2026-09-06 16:37 UTCEG score recompute
  37. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  38. 2026-09-05 18:50 UTCEG score recompute
  39. 2026-09-04 21:04 UTCEG score recompute
  40. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  41. 2026-09-03 00:56 UTCEG score recompute
  42. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  43. 2026-09-02 03:06 UTCEG score recompute
  44. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  45. 2026-09-01 05:17 UTCEG score recompute
  46. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  47. 2026-08-31 07:28 UTCEG score recompute
  48. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  49. 2026-08-30 09:40 UTCEG score recompute
  50. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  51. 2026-08-29 11:54 UTCEG score recompute
  52. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  53. 2026-08-27 16:12 UTCEG score recompute
  54. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  55. 2026-08-26 18:24 UTCEG score recompute
  56. 2026-08-26 18:07 UTCEG score recompute
  57. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  58. 2026-08-26 11:17 UTCEG score recompute
  59. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  60. 2026-08-24 15:44 UTCEG score recompute
  61. 2026-08-23 17:57 UTCEG score recompute
  62. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  63. 2026-08-21 22:25 UTCEG score recompute
  64. 2026-08-21 21:24 UTCEG score recomputeFirst assessed: 5.3 MEDIUM
  65. 2026-08-21 21:24 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-53497?
CVE-2026-53497 is a medium-severity vulnerability; its CVE record was published on August 21, 2026. CrossWatch (CW) is a synchronization engine. Prior to version 0.9.21, GET /api/app-auth/status is accessible without authentication and returns the other_sessions array, which exposes metadata of all active sessions — including originating IP addresses, User-Agent strings, internal session IDs, and…
When was the CVE record for CVE-2026-53497 published?
The CVE record for CVE-2026-53497 was published on August 21, 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 October 12, 2026; the record at its source may have been updated since.
Is CVE-2026-53497 actively exploited?
CVE-2026-53497 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (31st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-53497?
CVE-2026-53497 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-2026-53497?
A fix for CVE-2026-53497 is available: update to the fixed version the vendor names in its advisory.

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