CVE-2025-34291

CRITICALNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-05-21), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 3 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 84%CVSS: 8.8Exploit: cisa kev · ssvc active · epss top5pct · epss high · public exploitExposed: 0

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

Langflow versions up to and including 1.6.9 contain a chained vulnerability that enables account takeover and remote code execution. An overly permissive CORS configuration (allow_origins='*' with allow_credentials=True) combined with a refresh token cookie configured as SameSite=None allows a malicious webpage to perform cross-origin requests that include credentials and successfully call the refresh endpoint. An attacker-controlled origin can therefore obtain fresh access_token / refresh_token pairs for a victim session. Obtained tokens permit access to authenticated endpoints — including built-in code-execution functionality — allowing the attacker to execute arbitrary code and achieve full system compromise.

CVSS v3
8.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

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
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
84%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

December 5, 2025

Last Modified

July 14, 2026

Advisory Details (5)

Auto-updated May 22, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
generic🔴 Active Exploitation

CVE-2025-34291 Exploited in the Wild: LangFlow AI Framework Under Fire

https://www.crowdsec.net/vulntracking-report/cve-2025-34291
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-34291
generic

Langflow <= 1.6.9 CORS Misconfiguration to Token Hijack & RCE | Advisories | VulnCheck

https://www.vulncheck.com/advisories/langflow-cors-misconfiguration-to-token-hijack-and-rce
generic🔴 Active Exploitation

CVE-2025-34291: Critical Account Takeover and RCE Vulnerability in the Langflow AI Agent & Workflow Platform

https://www.obsidiansecurity.com/blog/cve-2025-34291-critical-account-takeover-and-rce-vulnerability-in-the-langflow-ai-agent-workflow-platform
generic

GitHub - langflow-ai/langflow: Langflow is a powerful tool for building and deploying AI-powered agents and workflows. · GitHub

https://github.com/langflow-ai/langflow

Vendor Advisories for CVE-2025-34291(1)

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 / EcosystemFixed in / PatchReleasedSource
piplangflow—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)
PyPI(1)
PackageVulnerable rangeFixed inDependents
langflow0.0.31 ... 1.6.9 (276 versions)1.7.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 42× 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 173 total refreshes for this CVE.

  1. 2026-08-30 22:42 UTCEG score recompute
  2. 2026-08-30 19:16 UTCEPSS rescore
  3. 2026-08-28 23:42 UTCEG score recompute
  4. 2026-08-28 21:40 UTCEPSS rescore
  5. 2026-08-27 17:22 UTCCISA KEV update
  6. 2026-08-27 16:17 UTCEG score recompute
  7. 2026-08-27 14:24 UTCEPSS rescore
  8. 2026-08-26 17:41 UTCCISA KEV update
  9. 2026-08-26 16:49 UTCEG score recompute
  10. 2026-08-26 14:45 UTCEPSS rescore
  11. 2026-08-25 17:18 UTCEG score recompute
  12. 2026-08-25 13:48 UTCEPSS rescore
  13. 2026-08-24 18:52 UTCCISA KEV update
  14. 2026-08-24 17:51 UTCEG score recompute
  15. 2026-08-24 10:03 UTCEG score recompute
  16. 2026-08-21 16:49 UTCCISA KEV update
  17. 2026-08-20 23:54 UTCEG score recompute
  18. 2026-08-20 22:54 UTCEPSS rescore
  19. 2026-08-20 17:06 UTCCISA KEV update
  20. 2026-08-19 20:31 UTCEG score recompute
  21. 2026-08-19 17:33 UTCCISA KEV update
  22. 2026-08-19 17:03 UTCEPSS rescore
  23. 2026-08-19 17:03 UTCEPSS rescore
  24. 2026-08-18 16:58 UTCCISA KEV update
  25. 2026-08-17 13:56 UTCCISA KEV update
Show 75 more
  1. 2026-08-16 02:29 UTCEG score recompute
  2. 2026-08-16 02:13 UTCEPSS rescore
  3. 2026-08-15 03:00 UTCEG score recompute
  4. 2026-08-15 01:29 UTCEPSS rescore
  5. 2026-08-12 16:22 UTCEG score recompute
  6. 2026-08-12 13:50 UTCEPSS rescore
  7. 2026-08-11 19:32 UTCCISA KEV update
  8. 2026-08-07 19:05 UTCEG score recompute
  9. 2026-08-07 17:09 UTCCISA KEV update
  10. 2026-08-07 16:26 UTCEPSS rescore
  11. 2026-08-05 17:25 UTCCISA KEV update
  12. 2026-08-04 17:02 UTCCISA KEV update
  13. 2026-08-04 16:43 UTCEG score recompute
  14. 2026-08-04 15:09 UTCEPSS rescore
  15. 2026-08-03 19:22 UTCCISA KEV update
  16. 2026-08-03 13:19 UTCEG score recompute
  17. 2026-08-03 10:35 UTCEPSS rescore
  18. 2026-07-30 11:25 UTCEG score recompute
  19. 2026-07-29 19:27 UTCCISA KEV update
  20. 2026-07-27 19:24 UTCCISA KEV update
  21. 2026-07-27 17:17 UTCCISA KEV update
  22. 2026-07-26 17:22 UTCEG score recompute
  23. 2026-07-26 14:54 UTCEPSS rescore
  24. 2026-07-26 13:27 UTCEG score recompute
  25. 2026-07-26 01:40 UTCEG score recompute
  26. 2026-07-25 14:17 UTCEPSS rescore
  27. 2026-07-25 14:17 UTCEPSS rescore
  28. 2026-07-24 14:17 UTCEPSS rescore
  29. 2026-07-23 02:54 UTCEG score recompute
  30. 2026-07-23 00:11 UTCEG score recompute
  31. 2026-07-22 19:40 UTCCISA KEV update
  32. 2026-07-22 16:20 UTCEG score recompute
  33. 2026-07-22 14:07 UTCEPSS rescore
  34. 2026-07-22 14:07 UTCEPSS rescore
  35. 2026-07-21 14:37 UTCCISA KEV update
  36. 2026-07-20 17:12 UTCEG score recompute
  37. 2026-07-20 17:07 UTCEPSS rescore
  38. 2026-07-16 17:04 UTCCISA KEV update
  39. 2026-07-16 17:02 UTCEPSS rescore
  40. 2026-07-15 16:57 UTCEPSS rescore
  41. 2026-07-15 16:57 UTCEPSS rescore
  42. 2026-07-15 16:49 UTCCISA KEV update
  43. 2026-07-15 15:04 UTCCISA KEV update
  44. 2026-07-15 01:59 UTCEPSS rescore
  45. 2026-07-15 01:59 UTCEPSS rescore
  46. 2026-07-14 23:23 UTCNVD updateCVSS v3 → 8.8 · severity → HIGH
  47. 2026-07-14 22:45 UTCMITRE cvelistV5CVSS v3 → 9.4 · severity → CRITICAL
  48. 2026-07-14 18:05 UTCCISA KEV update
  49. 2026-07-13 17:07 UTCCISA KEV update
  50. 2026-07-12 05:46 UTCEPSS rescore
  51. 2026-07-10 17:52 UTCCISA KEV update
  52. 2026-07-09 19:09 UTCEPSS rescore
  53. 2026-07-09 19:09 UTCEPSS rescore
  54. 2026-07-07 19:01 UTCCISA KEV update
  55. 2026-07-07 17:16 UTCCISA KEV update
  56. 2026-07-06 16:27 UTCEPSS rescore
  57. 2026-07-06 16:27 UTCEPSS rescore
  58. 2026-07-01 19:16 UTCCISA KEV update
  59. 2026-06-30 23:22 UTCEPSS rescore
  60. 2026-06-30 23:22 UTCEPSS rescore
  61. 2026-06-29 19:12 UTCCISA KEV update
  62. 2026-06-29 14:06 UTCEPSS rescore
  63. 2026-06-29 14:06 UTCEPSS rescore
  64. 2026-06-28 04:55 UTCEPSS rescore
  65. 2026-06-28 04:55 UTCEPSS rescore
  66. 2026-06-25 19:15 UTCCISA KEV update
  67. 2026-06-25 13:49 UTCEPSS rescore
  68. 2026-06-25 13:49 UTCEPSS rescore
  69. 2026-06-24 14:04 UTCEPSS rescore
  70. 2026-06-24 14:04 UTCEPSS rescore
  71. 2026-06-23 21:32 UTCEPSS rescore
  72. 2026-06-23 21:32 UTCEPSS rescore
  73. 2026-06-23 17:44 UTCCISA KEV update
  74. 2026-06-22 14:25 UTCEPSS rescore
  75. 2026-06-22 14:25 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2025/CVE-2025-34291.yaml
    First seen Jan 1, 2025

    Langflow AI <= 1.6.9 - CORS Misconfiguration

    Open source ↗

Related CVEs(same product + same CWE)

Frequently asked(6)

What is CVE-2025-34291?
CVE-2025-34291 is a critical vulnerability published on December 5, 2025. Langflow versions up to and including 1.6.9 contain a chained vulnerability that enables account takeover and remote code execution. An overly permissive CORS configuration (alloworigins='*' with allowcredentials=True) combined with a refresh token cookie configured as SameSite=None allows a…
When was CVE-2025-34291 disclosed?
CVE-2025-34291 was first published in the National Vulnerability Database on December 5, 2025, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-34291 actively exploited?
Yes. CISA added CVE-2025-34291 to the Known Exploited Vulnerabilities catalog on May 21, 2026, affecting Langflow Langflow. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2025-34291?
CVE-2025-34291 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2025-34291?
CVE-2025-34291 affects Langflow Langflow. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2025-34291?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-34291, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-34291

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