CVE-2026-54605

HIGHPre-NVD 7.27.2
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 7.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (8th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated

Also known asEUVD-2026-49901 (ENISA EUVD) · GHSA-prq8-7wvh-44qh (GitHub Security Advisories)Source: ENISA EUVD

7.2EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.2Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

OAuth is a Ruby wrapper for the OAuth 1.0 and 1.0a protocols, providing clients and servers. From 0.5.5 to 1.1.5, OAuth::Consumer#token_request parses the raw Location header of a 300 to 399 redirect returned by the OAuth server and follows the redirect recursively, which can mutate the consumer's configuration and expose signed OAuth request metadata, including the Authorization header, to a cross-origin host. This issue is fixed in version 1.1.6.

CVSS v3
7.2
EG Score
7.2HIGHmedium confidence
EG Risk
63
EG Risk 63/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity72% × 45%
Impact severity (EG Severity): CVSS 7.2 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
8th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.2): severity, escalated by confirmed exploitation. This CVE's 7.2 is its impact severity (EG Severity), not escalated.

EG Severity
7.2 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-30). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

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

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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

July 28, 2026

Last Modified

October 23, 2026

Advisory Details (3)

Auto-updated Jul 28, 2026
Patch available. Sources: github, github_commit, github_release.
GitHub release Patch Available

v1.1.6

Patch available: ruby-oauth/oauth v1.1.6

https://github.com/ruby-oauth/oauth/releases/tag/v1.1.6
GitHub commit Patch Available

commit d069dc8c4c96 (ruby-oauth/oauth)

Patch available: ruby-oauth/oauth v1.1.6 (contains commit d069dc8c4c96)

https://github.com/ruby-oauth/oauth/commit/d069dc8c4c9631947451215f07460d6cdf0caf3f
GitHub advisoryMentions a patch (unverified)

Cross-origin OAuth token-request redirects can expose signed request metadata · Advisory · ruby-oauth/oauth · GitHub

https://github.com/ruby-oauth/oauth/security/advisories/GHSA-prq8-7wvh-44qh

Vendor Advisories for CVE-2026-54605(1)

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

Affected Packages

(1 across 1 ecosystem)
RubyGems(1)
PackageVulnerable rangeFix by version rangeDependents
oauth0.5.10 ... 1.1.5 (22 versions)
  • 0.5.5 up to 1.1.6: fixed in 1.1.6
—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 43× 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 100 of 147 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. None are among the latest 100 rows. The 47 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-31 03:45 UTCEG score recompute
  2. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  3. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  4. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  5. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  6. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  7. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  8. 2026-10-25 14:19 UTCEG score recompute
  9. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  10. 2026-10-23 23:29 UTCEG score recompute
  11. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  12. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  13. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  14. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  15. 2026-10-20 09:45 UTCEG score recompute
  16. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  17. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  18. 2026-10-18 03:30 UTCEG score recompute
  19. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  20. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  21. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  22. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  23. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  24. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  25. 2026-10-12 15:41 UTCEG score recompute
Show 75 more
  1. 2026-10-11 19:39 UTCEG score recompute
  2. 2026-10-11 16:54 UTCEG score recompute
  3. 2026-10-11 14:17 UTCEG score recompute
  4. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  7. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  8. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  9. 2026-10-07 00:05 UTCEG score recompute
  10. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  11. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  12. 2026-10-05 02:43 UTCEG score recompute
  13. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  14. 2026-10-04 07:09 UTCEG score recompute
  15. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  16. 2026-10-02 18:24 UTCEG score recompute
  17. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  18. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  19. 2026-10-01 03:43 UTCEG score recompute
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  21. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  22. 2026-09-29 07:46 UTCEG score recompute
  23. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  24. 2026-09-28 03:22 UTCEG score recompute
  25. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  26. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  27. 2026-09-25 06:12 UTCEG score recompute
  28. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  29. 2026-09-23 21:55 UTCEG score recompute
  30. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  31. 2026-09-22 21:41 UTCEG score recompute
  32. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  33. 2026-09-20 00:36 UTCEG score recompute
  34. 2026-09-19 05:16 UTCEG score recompute
  35. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  36. 2026-09-18 02:06 UTCEG score recompute
  37. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  38. 2026-09-17 01:40 UTCEG score recompute
  39. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  40. 2026-09-15 08:38 UTCEG score recompute
  41. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  42. 2026-09-14 00:43 UTCEG score recompute
  43. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  44. 2026-09-12 15:57 UTCEG score recompute
  45. 2026-09-11 18:05 UTCEG score recompute
  46. 2026-09-10 20:13 UTCEG score recompute
  47. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  48. 2026-09-09 08:01 UTCEG score recompute
  49. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  50. 2026-09-07 20:55 UTCEG score recompute
  51. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  52. 2026-09-06 17:52 UTCEG score recompute
  53. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  54. 2026-09-05 19:10 UTCEG score recompute
  55. 2026-09-05 05:31 UTCEG score recompute
  56. 2026-09-01 22:53 UTCEG score recompute
  57. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  58. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  59. 2026-08-30 21:29 UTCEG score recompute
  60. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  61. 2026-08-30 10:27 UTCEG score recompute
  62. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  63. 2026-08-29 23:31 UTCEG score recompute
  64. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  65. 2026-08-27 22:30 UTCEG score recompute
  66. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  67. 2026-08-27 00:39 UTCEG score recompute
  68. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  69. 2026-08-25 15:48 UTCEG score recompute
  70. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  71. 2026-08-24 17:56 UTCEG score recompute
  72. 2026-08-23 08:16 UTCEG score recompute
  73. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  74. 2026-08-22 10:16 UTCEG score recompute
  75. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 3rd percentile

Frequently asked(5)

What is CVE-2026-54605?
CVE-2026-54605 is a high-severity vulnerability; its CVE record was published on July 28, 2026. OAuth is a Ruby wrapper for the OAuth 1.0 and 1.0a protocols, providing clients and servers. From 0.5.5 to 1.1.5, OAuth::Consumer#token_request parses the raw Location header of a 300 to 399 redirect returned by the OAuth server and follows the redirect recursively, which can mutate the consumer's…
When was the CVE record for CVE-2026-54605 published?
The CVE record for CVE-2026-54605 was published on July 28, 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 October 23, 2026; the record at its source may have been updated since.
Is CVE-2026-54605 actively exploited?
CVE-2026-54605 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (8th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54605?
CVE-2026-54605 has a CVSS base score of 7.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-54605?
A fix for CVE-2026-54605 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-54605 are linked in the Vendor Advisories panel on this page.

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