CVE-2026-35657

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 6.5 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.2% (14th 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

Also known asEUVD-2026-21460 (ENISA EUVD)Source: ENISA EUVD

6.5EG
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: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

OpenClaw before 2026.3.25 contains an authorization bypass vulnerability in the HTTP /sessions/:sessionKey/history route that skips operator.read scope validation. Attackers can access session history without proper operator read permissions by sending HTTP requests to the vulnerable endpoint.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

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)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
14th
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 (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 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. 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: 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.

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

April 10, 2026

Last Modified

June 23, 2026

Advisory Details (3)

Auto-updated Aug 2, 2026
Patch available. Sources: github, github_commit.
Web page

OpenClaw < 2026.3.25 - Authorization Bypass in HTTP Session History Route | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openclaw-authorization-bypass-in-http-session-history-route
GitHub commit

commit 1c4512323151 (openclaw/openclaw)

Fix landed in openclaw/openclaw commit 1c4512323151 — awaiting tagged release

https://github.com/openclaw/openclaw/commit/1c45123231516fa50f8cf8522ba5ff2fb2ca7aea
GitHub advisoryMentions a patch (unverified)

Gateway HTTP Session History Route Bypasses Operator Read Scope · Advisory · openclaw/openclaw · GitHub

https://github.com/openclaw/openclaw/security/advisories/GHSA-5jvj-hxmh-6h6j

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
openclaw—
  • every version up to 2026.3.25: fixed in 2026.3.25
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 36× 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. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  2. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  3. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  4. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  5. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  6. 2026-10-25 14:32 UTCEG score recompute
  7. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  8. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  9. 2026-10-23 03:04 UTCEG score recompute
  10. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  11. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  12. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  13. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  14. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  15. 2026-10-18 03:44 UTCEG score recompute
  16. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  17. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  18. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  19. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  20. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  21. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  22. 2026-10-12 16:11 UTCEG score recompute
  23. 2026-10-11 19:53 UTCEG score recompute
  24. 2026-10-11 17:06 UTCEG score recompute
  25. 2026-10-11 14:33 UTCEG score recompute
Show 74 more
  1. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  2. 2026-10-10 20:53 UTCOSV refresh
  3. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  4. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  5. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  6. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  7. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  8. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  9. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  10. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  12. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  13. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  14. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  15. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  16. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  17. 2026-09-21 08:19 UTCOSV refresh
  18. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  19. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  20. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  21. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  22. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  23. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  24. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  25. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  26. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  27. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  28. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  29. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  30. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  31. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  32. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  33. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  34. 2026-09-02 06:14 UTCOSV refresh
  35. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  36. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  37. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  38. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  39. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  40. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  41. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  42. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  43. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  44. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  45. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  46. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  47. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  48. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  49. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  50. 2026-08-16 07:02 UTCEG score recompute
  51. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  52. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  53. 2026-08-14 05:02 UTCEG score recompute
  54. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  55. 2026-08-12 19:15 UTCEG score recompute
  56. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  57. 2026-08-11 05:25 UTCEG score recompute
  58. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  59. 2026-08-10 04:55 UTCEG score recompute
  60. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  61. 2026-08-09 04:27 UTCEG score recompute
  62. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  63. 2026-08-07 14:18 UTCEG score recompute
  64. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  65. 2026-08-05 23:40 UTCEG score recompute
  66. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  67. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  68. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  69. 2026-08-03 21:54 UTCEG score recompute
  70. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  71. 2026-08-02 13:42 UTCEG score recompute
  72. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  73. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  74. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.2% · 14th percentile

Frequently asked(5)

What is CVE-2026-35657?
CVE-2026-35657 is a medium-severity vulnerability; its CVE record was published on April 10, 2026. OpenClaw before 2026.3.25 contains an authorization bypass vulnerability in the HTTP /sessions/:sessionKey/history route that skips operator.read scope validation. Attackers can access session history without proper operator read permissions by sending HTTP requests to the vulnerable endpoint.
When was CVE-2026-35657 made public?
CVE-2026-35657 was made public on March 26, 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 April 10, 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-2026-35657 actively exploited?
CVE-2026-35657 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (14th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-35657?
CVE-2026-35657 has a CVSS base score of 6.5 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-35657?
A fix for CVE-2026-35657 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-35657

Explore →

Is Your Infrastructure Affected by CVE-2026-35657?

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