CVE-2026-35628

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreMEDIUM confidence

Score 4.8 from GitHub Security Advisory published 2026-03-27. the CNA's CVSS baseline 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
4.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.8Exploit: None knownExposed: 0

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

OpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in Telegram webhook authentication that allows attackers to brute-force weak webhook secrets. The vulnerability enables repeated authentication guesses without throttling, permitting attackers to systematically guess webhook secrets through brute-force attacks.

CVSS v3
4.8
EG Score
4.8(medium)
EG Risk
22(Track)
EG Risk 22/100SSVC: Track

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
Severity48% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
21%
KEV
Not listed

Published

April 9, 2026

Last Modified

June 23, 2026

Advisory Details (3)

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

OpenClaw < 2026.3.25 - Brute-Force Attack via Missing Telegram Webhook Rate Limiting | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openclaw-brute-force-attack-via-missing-telegram-webhook-rate-limiting
github_commit

commit c2c136ae9517 (openclaw/openclaw)

Fix landed in openclaw/openclaw commit c2c136ae9517 — awaiting tagged release

https://github.com/openclaw/openclaw/commit/c2c136ae9517ddd0789d742a0fdf4c10e8c729a7
github Patch Available

Telegram Webhook Missing Guess Rate Limiting Enables Brute-Force Guessing of Weak Webhook Secret · Advisory · openclaw/openclaw · GitHub

https://github.com/openclaw/openclaw/security/advisories/GHSA-vcx4-4qxg-mfp4

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
npmopenclaw—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 rangeFixed inDependents
openclaw———

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 155 total refreshes for this CVE.

  1. 2026-08-25 13:49 UTCEPSS rescore
  2. 2026-08-23 00:19 UTCEPSS rescore
  3. 2026-08-21 23:49 UTCEPSS rescore
  4. 2026-08-20 22:55 UTCEPSS rescore
  5. 2026-08-19 17:03 UTCEPSS rescore
  6. 2026-08-18 13:48 UTCEPSS rescore
  7. 2026-08-17 13:47 UTCEPSS rescore
  8. 2026-08-16 14:56 UTCEPSS rescore
  9. 2026-08-16 07:07 UTCEG score recompute
  10. 2026-08-16 07:07 UTCGHSA enrichment
  11. 2026-08-16 02:14 UTCEPSS rescore
  12. 2026-08-15 01:30 UTCEPSS rescore
  13. 2026-08-14 05:06 UTCEG score recompute
  14. 2026-08-14 05:06 UTCGHSA enrichment
  15. 2026-08-13 22:00 UTCEPSS rescore
  16. 2026-08-12 19:18 UTCEG score recompute
  17. 2026-08-12 19:18 UTCGHSA enrichment
  18. 2026-08-12 13:50 UTCEPSS rescore
  19. 2026-08-11 04:15 UTCEG score recompute
  20. 2026-08-11 04:15 UTCGHSA enrichment
  21. 2026-08-11 00:00 UTCEPSS rescore
  22. 2026-08-10 04:23 UTCEG score recompute
  23. 2026-08-10 04:23 UTCGHSA enrichment
  24. 2026-08-09 13:46 UTCEPSS rescore
  25. 2026-08-09 04:32 UTCEG score recompute
Show 75 more
  1. 2026-08-09 04:32 UTCGHSA enrichment
  2. 2026-08-08 16:37 UTCEPSS rescore
  3. 2026-08-07 14:24 UTCEG score recompute
  4. 2026-08-07 14:23 UTCGHSA enrichment
  5. 2026-08-06 13:46 UTCEPSS rescore
  6. 2026-08-05 23:44 UTCEG score recompute
  7. 2026-08-05 23:44 UTCGHSA enrichment
  8. 2026-08-05 19:17 UTCEPSS rescore
  9. 2026-08-04 15:10 UTCEPSS rescore
  10. 2026-08-04 10:38 UTCEPSS rescore
  11. 2026-08-03 21:58 UTCEG score recompute
  12. 2026-08-03 21:58 UTCGHSA enrichment
  13. 2026-08-03 10:36 UTCEPSS rescore
  14. 2026-08-02 13:52 UTCEG score recompute
  15. 2026-08-02 13:52 UTCGHSA enrichment
  16. 2026-08-02 02:27 UTCEPSS rescore
  17. 2026-08-01 04:16 UTCEPSS rescore
  18. 2026-07-30 16:28 UTCEPSS rescore
  19. 2026-07-30 01:30 UTCEPSS rescore
  20. 2026-07-27 14:13 UTCEPSS rescore
  21. 2026-07-26 14:54 UTCEPSS rescore
  22. 2026-07-26 14:54 UTCEPSS rescore
  23. 2026-07-25 14:18 UTCEPSS rescore
  24. 2026-07-25 14:18 UTCEPSS rescore
  25. 2026-07-24 14:17 UTCEPSS rescore
  26. 2026-07-24 14:17 UTCEPSS rescore
  27. 2026-07-23 14:18 UTCEPSS rescore
  28. 2026-07-23 14:18 UTCEPSS rescore
  29. 2026-07-23 03:10 UTCEG score recompute
  30. 2026-07-22 14:08 UTCEPSS rescore
  31. 2026-07-21 15:24 UTCEPSS rescore
  32. 2026-07-20 20:02 UTCOSV refresh
  33. 2026-07-20 17:08 UTCEPSS rescore
  34. 2026-07-19 14:31 UTCEPSS rescore
  35. 2026-07-19 02:29 UTCEPSS rescore
  36. 2026-07-18 10:04 UTCEPSS rescore
  37. 2026-07-16 17:03 UTCEPSS rescore
  38. 2026-07-15 16:57 UTCEPSS rescore
  39. 2026-07-15 16:57 UTCEPSS rescore
  40. 2026-07-15 02:00 UTCEPSS rescore
  41. 2026-07-13 22:30 UTCEPSS rescore
  42. 2026-07-13 06:13 UTCEPSS rescore
  43. 2026-07-13 06:13 UTCEPSS rescore
  44. 2026-07-12 05:46 UTCEPSS rescore
  45. 2026-07-11 08:27 UTCEPSS rescore
  46. 2026-07-09 19:10 UTCEPSS rescore
  47. 2026-07-08 15:15 UTCEPSS rescore
  48. 2026-07-07 13:46 UTCEPSS rescore
  49. 2026-07-06 16:27 UTCEPSS rescore
  50. 2026-07-06 16:27 UTCEPSS rescore
  51. 2026-07-06 02:23 UTCEPSS rescore
  52. 2026-07-06 02:23 UTCEPSS rescore
  53. 2026-07-05 02:30 UTCEPSS rescore
  54. 2026-07-01 15:06 UTCEPSS rescore
  55. 2026-06-30 23:22 UTCEPSS rescore
  56. 2026-06-29 14:06 UTCEPSS rescore
  57. 2026-06-28 14:07 UTCEPSS rescore
  58. 2026-06-28 14:07 UTCEPSS rescore
  59. 2026-06-28 04:56 UTCEPSS rescore
  60. 2026-06-28 04:56 UTCEPSS rescore
  61. 2026-06-27 03:08 UTCEPSS rescore
  62. 2026-06-25 13:49 UTCEPSS rescore
  63. 2026-06-25 13:49 UTCEPSS rescore
  64. 2026-06-24 14:05 UTCEPSS rescore
  65. 2026-06-23 21:33 UTCEPSS rescore
  66. 2026-06-23 21:33 UTCEPSS rescore
  67. 2026-06-22 14:25 UTCEPSS rescore
  68. 2026-06-22 14:25 UTCEPSS rescore
  69. 2026-06-21 14:56 UTCEPSS rescore
  70. 2026-06-21 14:56 UTCEPSS rescore
  71. 2026-06-21 01:59 UTCEPSS rescore
  72. 2026-06-19 19:25 UTCEPSS rescore
  73. 2026-06-19 19:25 UTCEPSS rescore
  74. 2026-06-18 17:52 UTCEPSS rescore
  75. 2026-06-18 17:52 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-35628?
CVE-2026-35628 is a medium vulnerability published on April 9, 2026. OpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in Telegram webhook authentication that allows attackers to brute-force weak webhook secrets. The vulnerability enables repeated authentication guesses without throttling, permitting attackers to systematically guess webhook…
When was CVE-2026-35628 disclosed?
CVE-2026-35628 was first published in the National Vulnerability Database on April 9, 2026, with the most recent update on June 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-35628 actively exploited?
CVE-2026-35628 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 79.3% of all scored CVEs.
What is the CVSS score of CVE-2026-35628?
CVE-2026-35628 has a CVSS v4.0 base score of 4.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-35628?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-35628, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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