CVE-2026-33758

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.4% (37th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this week
6.1EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

OpenBao is an open source identity-based secrets management system. Prior to version 2.5.2, OpenBao installations that have an OIDC/JWT authentication method enabled and a role with callback_mode=direct configured are vulnerable to XSS via the error_description parameter on the page for a failed authentication. This allows an attacker access to the token used in the Web UI by a victim. The error_description parameter has been replaced with a static error message in v2.5.2. The vulnerability can be mitigated by removing any roles with callback_mode set to direct.

CVSS v3
6.1
EG Score
6.1MEDIUMmedium confidence
EG Risk
28
EG Risk 28/100

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 (value × EchelonGraph’s weight)
Severity61% × 45%
The EG Score, 6.1 of 10.
Exploitation0% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
37th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

March 27, 2026

Last Modified

July 15, 2026

Advisory Details (3)

Auto-updated Jul 15, 2026
Patch available. Sources: github_commit, github, github_pr.
github_commit

commit 6e2b2dd84f0e (openbao/openbao)

Fix landed in openbao/openbao commit 6e2b2dd84f0e — awaiting tagged release

https://github.com/openbao/openbao/commit/6e2b2dd84f0e47cebc90d6e79609dd5274732662
github_pr

Resolve GHSA-cpj3-3r2f-xj59

Fix merged in openbao/openbao PR #2709 on 2026-03-25 — awaiting tagged release

https://github.com/openbao/openbao/pull/2709
githubMentions a patch (unverified)

Reflected XSS in OpenBao OIDC authentication error message · Advisory · openbao/openbao · GitHub

https://github.com/openbao/openbao/security/advisories/GHSA-cpj3-3r2f-xj59

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/openbao/openbao—
  • every version up to 0.0.0-20260325133417-6e2b2dd84f0e: fixed in 0.0.0-20260325133417-6e2b2dd84f0e
—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 27× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 92 of 110 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 8 repeat rows among the latest 100 are merged into the row they repeat. The 18 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 17:08 UTCEG score recompute
  2. 2026-10-11 14:35 UTCEG score recompute
  3. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  4. 2026-10-11 04:31 UTCOSV refresh
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  7. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  8. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  9. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  10. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  12. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  13. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  14. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  15. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  16. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  17. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  18. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  19. 2026-09-21 16:19 UTCOSV refresh
  20. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  21. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  22. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  23. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  24. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  25. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 21st percentile
Show 67 more
  1. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  2. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  3. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  4. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  5. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  6. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  7. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  8. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  9. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  10. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  11. 2026-09-02 13:14 UTCOSV refresh
  12. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  13. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  14. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  15. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  16. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  17. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  18. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  19. 2026-08-24 14:17 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  20. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  21. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  22. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  23. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  24. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  25. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  26. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  27. 2026-08-16 10:00 UTCEG score recompute
  28. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  29. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  30. 2026-08-14 06:18 UTCEG score recompute
  31. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  32. 2026-08-12 20:37 UTCEG score recompute
  33. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  34. 2026-08-11 04:26 UTCEG score recompute
  35. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  36. 2026-08-10 05:09 UTCEG score recompute
  37. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  38. 2026-08-09 05:52 UTCEG score recompute
  39. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  40. 2026-08-07 16:19 UTCEG score recompute
  41. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  42. 2026-08-06 00:47 UTCEG score recompute
  43. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  44. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  45. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  46. 2026-08-02 15:12 UTCEG score recompute
  47. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  48. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  49. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  50. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  51. 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  52. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  53. 2026-07-25 14:18 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  54. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  55. 2026-07-23 14:18 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  56. 2026-07-23 03:09 UTCEG score recompute
  57. 2026-07-22 14:08 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  58. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  59. 2026-07-20 17:08 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  60. 2026-07-19 14:31 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  61. 2026-07-19 02:29 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  62. 2026-07-18 10:04 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  63. 2026-07-18 06:59 UTCOSV refresh
  64. 2026-07-16 17:03 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  65. 2026-07-15 16:57 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  66. 2026-07-15 02:22 UTCNVD updateCVSS v3 → 6.1 · severity → MEDIUM
  67. 2026-07-15 02:00 UTCEPSS rescoreEPSS 0.3% · 20th percentile

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Frequently asked(5)

What is CVE-2026-33758?
CVE-2026-33758 is a medium-severity vulnerability; its CVE record was published on March 27, 2026. OpenBao is an open source identity-based secrets management system. Prior to version 2.5.2, OpenBao installations that have an OIDC/JWT authentication method enabled and a role with callbackmode=direct configured are vulnerable to XSS via the errordescription parameter on the page for a failed…
When was the CVE record for CVE-2026-33758 published?
The CVE record for CVE-2026-33758 was published on March 27, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 15, 2026; the record at its source may have been updated since.
Is CVE-2026-33758 actively exploited?
CVE-2026-33758 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-33758?
CVE-2026-33758 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-33758?
A fix for CVE-2026-33758 is available: update to the fixed version the vendor names in its advisory.

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