CVE-2026-86536

MEDIUMPre-NVD 6.36.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 6.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (22nd 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
Trending — 4 sources updated this week

Also known asEUVD-2026-91397 (ENISA EUVD) · GHSA-9fmc-g2q8-p66m (GitHub Security Advisories)Source: ENISA EUVD

6.3EG
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: 0.3%CVSS: 6.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Improperly controlled modification of object prototype attributes ('prototype pollution') vulnerability in Apache Thrift all JS bindings.

This issue affects Apache Thrift: before 0.25.0.

Users are recommended to upgrade to version 0.25.0 and re-generate JS code, which fixes the issue.

CVSS v3
6.3
EG Score
6.3MEDIUMmedium confidence
EG Risk
28
EG Risk 28/100

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)
Severity63% × 45%
Impact severity (EG Severity): CVSS 6.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
22nd
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 (6.3): severity, escalated by confirmed exploitation. This CVE's 6.3 is its impact severity (EG Severity), not escalated.

EG Severity
6.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). 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 every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.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 every mission impact level.

A fix is available. Apply it within your standard update timelines.

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.

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

October 2, 2026

Last Modified

October 2, 2026

Advisory Details (2)

Auto-updated Oct 2, 2026
Patch available.
Web page

Pony Mail

https://lists.apache.org/thread/xckvfky30kdnk8vqnhy0wndthvc9nymp
Web page

Pony Mail

https://lists.apache.org/thread/33otcgbqd27wf6qq810q56znzbomnhg1

Vendor Advisories for CVE-2026-86536(3)

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 / EcosystemFix (by version range) / PatchReleasedSource
redhatthrift-main-0.25.0-0.1.hum12026-10-01redhat

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.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
thrift0.17.0-2 ... 0.24.0-2 (21 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
thrift0.19.0-4 ... 0.24.0-2 (11 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
thrift0.19.0-4 ... 0.24.0-2 (11 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 61× 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. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  4. 2026-10-29 17:07 UTCEG score recompute
  5. 2026-10-29 17:07 UTCVendor advisory
  6. 2026-10-29 17:07 UTCGHSA enrichmentGHSA-9fmc-g2q8-p66m
  7. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  8. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  9. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  10. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  11. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  12. 2026-10-25 13:54 UTCEG score recompute
  13. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  14. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  15. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  16. 2026-10-22 12:45 UTCEG score recompute
  17. 2026-10-22 12:45 UTCVendor advisory
  18. 2026-10-22 12:45 UTCGHSA enrichmentGHSA-9fmc-g2q8-p66m
  19. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  20. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  21. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  22. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  23. 2026-10-18 03:04 UTCEG score recompute
  24. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  25. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.5% · 38th percentile
Show 44 more
  1. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  2. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  3. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  4. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  5. 2026-10-12 14:51 UTCEG score recompute
  6. 2026-10-11 19:17 UTCEG score recompute
  7. 2026-10-11 16:33 UTCEG score recompute
  8. 2026-10-11 13:50 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  10. 2026-10-11 04:08 UTCEG score recompute
  11. 2026-10-11 04:08 UTCVendor advisory
  12. 2026-10-11 04:08 UTCGHSA enrichmentGHSA-9fmc-g2q8-p66m
  13. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  14. 2026-10-10 02:54 UTCEG score recompute
  15. 2026-10-10 02:54 UTCVendor advisory
  16. 2026-10-10 02:54 UTCGHSA enrichmentGHSA-9fmc-g2q8-p66m
  17. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  18. 2026-10-09 01:40 UTCEG score recompute
  19. 2026-10-09 01:40 UTCVendor advisory
  20. 2026-10-09 01:40 UTCGHSA enrichmentGHSA-9fmc-g2q8-p66m
  21. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  22. 2026-10-08 00:27 UTCEG score recompute
  23. 2026-10-08 00:27 UTCVendor advisory
  24. 2026-10-08 00:27 UTCGHSA enrichmentGHSA-9fmc-g2q8-p66m
  25. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  26. 2026-10-06 23:12 UTCEG score recompute
  27. 2026-10-06 23:12 UTCVendor advisory
  28. 2026-10-06 23:12 UTCGHSA enrichmentGHSA-9fmc-g2q8-p66m
  29. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  30. 2026-10-05 21:59 UTCEG score recompute
  31. 2026-10-05 21:59 UTCGHSA enrichmentGHSA-9fmc-g2q8-p66m
  32. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  33. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  34. 2026-10-04 20:46 UTCGHSA enrichmentGHSA-9fmc-g2q8-p66m
  35. 2026-10-03 19:32 UTCEG score recompute
  36. 2026-10-03 19:32 UTCGHSA enrichmentGHSA-9fmc-g2q8-p66m
  37. 2026-10-02 18:19 UTCEG score recompute
  38. 2026-10-02 18:19 UTCGHSA enrichmentGHSA-9fmc-g2q8-p66m
  39. 2026-10-02 17:41 UTCEG score recompute
  40. 2026-10-02 17:40 UTCGHSA enrichmentGHSA-9fmc-g2q8-p66m
  41. 2026-10-02 14:41 UTCGHSA enrichmentGHSA-9fmc-g2q8-p66m
  42. 2026-10-02 12:23 UTCEG score recompute
  43. 2026-10-02 11:48 UTCEG score recomputeFirst assessed: 6.3 MEDIUM
  44. 2026-10-02 11:45 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-86536?
CVE-2026-86536 is a medium-severity vulnerability; its CVE record was published on October 2, 2026. Improperly controlled modification of object prototype attributes ('prototype pollution') vulnerability in Apache Thrift all JS bindings. This issue affects Apache Thrift: before 0.25.0. Users are recommended to upgrade to version 0.25.0 and re-generate JS code, which fixes the issue.
When was the CVE record for CVE-2026-86536 published?
The CVE record for CVE-2026-86536 was published on October 2, 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 2, 2026; the record at its source may have been updated since.
Is CVE-2026-86536 actively exploited?
CVE-2026-86536 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (22nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-86536?
CVE-2026-86536 has a CVSS base score of 6.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-86536?
A fix for CVE-2026-86536 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-86536 are linked in the Vendor Advisories panel on this page.

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