CVE-2025-34291

HIGHNVD 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 — 5 sources updated this weekExploited in the wild
8.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 79%CVSS: 8.8Exploit: NoneExposed: 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)
EPSS
99.6%
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 57× in last 7d / 229× 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 392 total refreshes for this CVE.

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

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 high 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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