CVE-2026-27524

MEDIUMPre-NVD 4.34.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 4.3 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.2% (15th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from the CNA's CVSS
Sources: the CNA's CVSS, EPSS
Trending — 4 sources updated this week

Also known asEUVD-2026-12736 (ENISA EUVD) · GHSA-62f6-mrcj-v8h5 (GitHub Security Advisories)Source: ENISA EUVD

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: 0.2%CVSS: 4.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

OpenClaw versions prior to 2026.2.21 accept prototype-reserved keys in runtime /debug set override object values, allowing prototype pollution attacks. Authorized /debug set callers can inject __proto__, constructor, or prototype keys to manipulate object prototypes and bypass command gate restrictions.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
19
EG Risk 19/100

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)
Severity43% × 45%
Impact severity (EG Severity): CVSS 4.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 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
0.2%
EPSS %ILE
15th
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 (4.3): severity, escalated by confirmed exploitation. This CVE's 4.3 is its impact severity (EG Severity), not escalated.

EG Severity
4.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.the CNA's CVSS · CVSS v3.0 or v3.1
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). 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

March 18, 2026

Last Modified

June 23, 2026

Advisory Details (3)

Auto-updated Aug 7, 2026
Patch available. Sources: github, github_commit.
Web page

OpenClaw < 2026.2.21 - Prototype Pollution via Debug Override Path | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openclaw-prototype-pollution-via-debug-override-path
GitHub commit

commit fbb79d401300 (openclaw/openclaw)

Fix landed in openclaw/openclaw commit fbb79d401300 — awaiting tagged release

https://github.com/openclaw/openclaw/commit/fbb79d4013000552d6a2c23b9613d8b3cb92f6b6
GitHub advisoryMentions a patch (unverified)

Runtime /debug override path accepted prototype-reserved keys · Advisory · openclaw/openclaw · GitHub

https://github.com/openclaw/openclaw/security/advisories/GHSA-62f6-mrcj-v8h5

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
npmopenclaw @ 2026.2.21 (fixes < 2026.2.21)—ghsa

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

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
openclaw—
  • every version up to 2026.2.21: fixed in 2026.2.21
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 40× 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 97 of 153 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. 3 repeat rows among the latest 100 are merged into the row they repeat. The 56 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  2. 2026-11-01 07:56 UTCGHSA enrichmentGHSA-62f6-mrcj-v8h5 · GitHub severity LOW
  3. 2026-11-01 07:56 UTCEG score recompute
  4. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  5. 2026-10-31 00:25 UTCOSV refresh
  6. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  7. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  8. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  9. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  10. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  11. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  12. 2026-10-25 14:38 UTCEG score recompute
  13. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  14. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  15. 2026-10-23 04:24 UTCEG score recompute
  16. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  17. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  18. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  19. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  20. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  21. 2026-10-18 03:51 UTCEG score recompute
  22. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  23. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  24. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  25. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
Show 72 more
  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  2. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  3. 2026-10-12 16:17 UTCEG score recompute
  4. 2026-10-11 19:59 UTCEG score recompute
  5. 2026-10-11 17:13 UTCEG score recompute
  6. 2026-10-11 14:44 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  8. 2026-10-11 09:44 UTCOSV refresh
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  11. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  12. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  13. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  14. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  15. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  16. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  17. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  18. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  19. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  20. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  21. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  22. 2026-09-21 22:15 UTCOSV refresh
  23. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  24. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  25. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  26. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  27. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  28. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  29. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  30. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  31. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  32. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  33. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  34. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  35. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  36. 2026-09-02 18:08 UTCOSV refresh
  37. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  38. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  39. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  40. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  41. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  42. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  43. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  44. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  45. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  46. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  47. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  48. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  49. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  50. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  51. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  52. 2026-08-16 11:19 UTCEG score recompute
  53. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  54. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  55. 2026-08-12 22:13 UTCEG score recompute
  56. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  57. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  58. 2026-08-11 06:08 UTCEG score recompute
  59. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  60. 2026-08-10 06:35 UTCEG score recompute
  61. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  62. 2026-08-09 07:01 UTCEG score recompute
  63. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  64. 2026-08-07 17:35 UTCEG score recompute
  65. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  66. 2026-08-06 01:40 UTCEG score recompute
  67. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  68. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  69. 2026-08-02 16:44 UTCEG score recompute
  70. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  71. 2026-08-01 19:36 UTCOSV refresh
  72. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.2% · 14th percentile

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-27524?
CVE-2026-27524 is a medium-severity vulnerability; its CVE record was published on March 18, 2026. OpenClaw versions prior to 2026.2.21 accept prototype-reserved keys in runtime /debug set override object values, allowing prototype pollution attacks. Authorized /debug set callers can inject proto, constructor, or prototype keys to manipulate object prototypes and bypass command gate restrictions.
When was CVE-2026-27524 made public?
CVE-2026-27524 was made public on February 21, 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 March 18, 2026. EchelonGraph's copy of the record carries a last-modified date of June 23, 2026; the record at its source may have been updated since.
Is CVE-2026-27524 actively exploited?
CVE-2026-27524 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (15th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-27524?
CVE-2026-27524 has a CVSS base score of 4.3 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-27524?
A fix for CVE-2026-27524 is available: update to the fixed version the vendor names in its advisory.

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