CVE-2026-85181

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-03. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

CAT uses Java String.hashCode as the sole integrity check for session cookies without server-side keying, allowing attackers to forge valid checksums offline. Attackers can set the x-forwarded-for header to bypass IP binding validation and create admin sessions with full configuration access.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

September 3, 2026

Last Modified

September 3, 2026

Advisory Details (5)

Auto-updated Sep 17, 2026
No patch confirmed yet.
generic

CAT through 3.1.0 Session Cookie Forgery via Unkeyed hashCode Checksum | Advisories | VulnCheck

https://www.vulncheck.com/advisories/cat-through-3.1.0-session-cookie-forgery-via-unkeyed-hashcode-checksum
generic

Session cookie forgery allows unauthenticated admin access · Issue #2384 · dianping/cat · GitHub

https://github.com/dianping/cat/issues/2384
generic

cat/cat-home/src/main/java/com/dianping/cat/util/HttpUtils.java at 3.1.0 · dianping/cat · GitHub

https://github.com/dianping/cat/blob/3.1.0/cat-home/src/main/java/com/dianping/cat/util/HttpUtils.java
generic

cat/cat-home/src/main/java/com/dianping/cat/system/page/login/service/TokenBuilder.java at 3.1.0 · dianping/cat · GitHub

https://github.com/dianping/cat/blob/3.1.0/cat-home/src/main/java/com/dianping/cat/system/page/login/service/TokenBuilder.java
generic

GitHub - dianping/cat: CAT 作为服务端项目基础组件，提供了 Java, C/C++, Node.js, Python, Go 等多语言客户端，已经在美团点评的基础架构中间件框架（MVC框架，RPC框架，数据库框架，缓存框架等，消息队列，配置系统等）深度集成，为美团点评各业务线提供系统丰富的性能指标、健康状况、实时告警等。 · GitHub

https://github.com/dianping/cat

Vendor Advisories for CVE-2026-85181(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 53× in last 7d / 117× 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 117 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-85181?
CVE-2026-85181 is a critical vulnerability published on September 3, 2026. CAT uses Java String.hashCode as the sole integrity check for session cookies without server-side keying, allowing attackers to forge valid checksums offline. Attackers can set the x-forwarded-for header to bypass IP binding validation and create admin sessions with full configuration access.
When was CVE-2026-85181 disclosed?
CVE-2026-85181 was first published in the National Vulnerability Database on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-85181 actively exploited?
CVE-2026-85181 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 68.0% of all scored CVEs.
What is the CVSS score of CVE-2026-85181?
CVE-2026-85181 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-85181?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-85181, 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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