CVE-2026-13543

MEDIUMPre-NVD 5.65.6—
EchelonGraph scoreMEDIUM confidence

Score 5.6 from GitHub Security Advisory (severity: LOW) published 2026-06-29. a secondary CVSS source baseline 5.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
5.6EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.6Exploit: Elevated riskExposed: 0

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

A vulnerability was detected in Documenso up to 2.11.0. Affected by this vulnerability is an unknown functionality of the file packages/auth/server/lib/utils/handle-oauth-callback-url.ts of the component Google OAuth Login. The manipulation results in improper authentication. It is possible to launch the attack remotely. This attack is characterized by high complexity. The exploitation appears to be difficult. The exploit is now public and may be used. The pull request to fix this issue awaits acceptance.

CVSS v3
5.6
EG Score
5.6(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity56% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
45%
KEV
Not listed

Published

June 29, 2026

Last Modified

June 29, 2026

Advisory Details (3)

Auto-updated Jun 29, 2026
No patch confirmed yet. Sources: github_pr.
github_pr

fix(auth): secure OAuth 2FA bypass vulnerability

Upstream fix in progress (PR #2837 · documenso/documenso, state=open)

https://github.com/documenso/documenso/pull/2837
generic

Bug Bounty report: 2FA Bypass via Google OAuth Login Allows Unauthorized Account Access · Issue #2758 · documenso/documenso · GitHub

https://github.com/documenso/documenso/issues/2758
generic

GitHub - documenso/documenso: The Open Source DocuSign Alternative. · GitHub

https://github.com/documenso/documenso/

Vendor Advisories for CVE-2026-13543(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 11× in last 7d / 76× 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 145 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-13543?
CVE-2026-13543 is a medium vulnerability published on June 29, 2026. A vulnerability was detected in Documenso up to 2.11.0. Affected by this vulnerability is an unknown functionality of the file packages/auth/server/lib/utils/handle-oauth-callback-url.ts of the component Google OAuth Login. The manipulation results in improper authentication. It is possible to…
When was CVE-2026-13543 disclosed?
CVE-2026-13543 was first published in the National Vulnerability Database on June 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13543 actively exploited?
CVE-2026-13543 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 54.6% of all scored CVEs.
What is the CVSS score of CVE-2026-13543?
CVE-2026-13543 has a CVSS v3 base score of 5.6 (NVD).
How do I remediate CVE-2026-13543?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13543, 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.

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