CVE-2026-49329

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-01. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — Patch released this week

Also known asEUVD-2026-69301 (ENISA EUVD) · GHSA-2mr2-j2wm-v93x (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
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).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in openshift/oauth-server. The OAuth login and error page endpoints pass the unauthenticated Accept-Language header to golang.org/x/text/language.ParseAcceptLanguage() without input validation. A bypass of the CVE-2022-32149 mitigation exists: the upstream guard counts only '-' characters but the internal BCP 47 scanner aliases '_' to '-' after the guard check. An unauthenticated attacker can send a crafted Accept-Language header using '_' separators to trigger quadratic-time parsing, consuming excessive CPU and denying authentication to all cluster users.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

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)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.7% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
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 none (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
0.7%
EPSS %ILE
54th
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 (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.7% within 30 daysSource: FIRST EPSS. 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 none (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

September 1, 2026

Last Modified

October 30, 2026

Advisory Details (2)

Auto-updated Sep 1, 2026
Patch available. Sources: redhat.
Red Hat

2483248 – (CVE-2026-49329) CVE-2026-49329 openshift/oauth-server: openshift/oauth-server: Quadratic-time DoS via Accept-Language header underscore bypass on unauthenticated login endpoints

https://bugzilla.redhat.com/show_bug.cgi?id=2483248
Red HatMentions a patch (unverified)

CVE-2026-49329 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-49329

Patch Availability(8)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatopenshift4/ose-oauth-server-rhel9:17928838892026-10-27redhat
redhatopenshift4/ose-oauth-server-rhel8:17918391202026-10-22redhat
redhatopenshift4/ose-oauth-server-rhel9:17915985392026-10-22redhat
redhatopenshift4/ose-oauth-server-rhel9:17908823232026-10-15redhat
redhatopenshift4/ose-oauth-server-rhel9:17906116332026-10-07redhat
redhatopenshift4/ose-oauth-server-rhel9:17907020872026-10-06redhat
redhatopenshift4/ose-oauth-server-rhel9:17907071062026-10-06redhat
redhatopenshift4/ose-oauth-server-rhel9:17907131502026-10-06redhat

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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 106× 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 99 of 220 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 121 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  2. 2026-10-30 05:26 UTCEG score recompute
  3. 2026-10-30 05:26 UTCVendor advisory
  4. 2026-10-30 05:26 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  5. 2026-10-30 04:31 UTCEG score recompute
  6. 2026-10-30 04:31 UTCVendor advisory
  7. 2026-10-30 04:31 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  8. 2026-10-29 17:27 UTCEG score recompute
  9. 2026-10-29 17:27 UTCVendor advisory
  10. 2026-10-29 17:27 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  11. 2026-10-29 17:17 UTCEG score recompute
  12. 2026-10-29 17:17 UTCVendor advisory
  13. 2026-10-29 17:17 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  14. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  15. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  16. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  17. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  18. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  19. 2026-10-25 14:22 UTCEG score recompute
  20. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  21. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  22. 2026-10-23 06:26 UTCEG score recompute
  23. 2026-10-23 06:26 UTCVendor advisory
  24. 2026-10-23 06:26 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  25. 2026-10-23 05:27 UTCEG score recompute
Show 74 more
  1. 2026-10-23 05:27 UTCVendor advisory
  2. 2026-10-23 05:27 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  3. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  4. 2026-10-22 15:13 UTCEG score recompute
  5. 2026-10-22 15:13 UTCVendor advisory
  6. 2026-10-22 15:13 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  7. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  8. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  9. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  10. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  11. 2026-10-18 03:34 UTCEG score recompute
  12. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  13. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  14. 2026-10-15 20:29 UTCEG score recompute
  15. 2026-10-15 20:29 UTCVendor advisory
  16. 2026-10-15 20:29 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  17. 2026-10-15 19:30 UTCEG score recompute
  18. 2026-10-15 19:30 UTCVendor advisory
  19. 2026-10-15 19:30 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  20. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.8% · 57th percentile
  21. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.8% · 57th percentile
  22. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  23. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  24. 2026-10-12 16:00 UTCEG score recompute
  25. 2026-10-11 19:43 UTCEG score recompute
  26. 2026-10-11 16:57 UTCEG score recompute
  27. 2026-10-11 14:21 UTCEG score recompute
  28. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  29. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  30. 2026-10-10 12:11 UTCVendor advisory
  31. 2026-10-10 12:11 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  32. 2026-10-10 00:13 UTCEG score recompute
  33. 2026-10-10 00:13 UTCVendor advisory
  34. 2026-10-10 00:13 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  35. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  36. 2026-10-09 02:04 UTCEG score recompute
  37. 2026-10-09 02:04 UTCVendor advisory
  38. 2026-10-09 02:04 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  39. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  40. 2026-10-08 03:57 UTCEG score recompute
  41. 2026-10-08 03:57 UTCVendor advisory
  42. 2026-10-08 03:57 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  43. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  44. 2026-10-07 16:00 UTCEG score recompute
  45. 2026-10-07 16:00 UTCVendor advisory
  46. 2026-10-07 16:00 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  47. 2026-10-07 14:29 UTCEG score recompute
  48. 2026-10-07 14:29 UTCVendor advisory
  49. 2026-10-07 14:29 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  50. 2026-10-07 00:21 UTCEG score recompute
  51. 2026-10-07 00:21 UTCVendor advisory
  52. 2026-10-07 00:21 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  53. 2026-10-06 23:27 UTCEG score recompute
  54. 2026-10-06 23:27 UTCVendor advisory
  55. 2026-10-06 23:27 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  56. 2026-10-06 22:21 UTCEG score recompute
  57. 2026-10-06 22:21 UTCVendor advisory
  58. 2026-10-06 22:21 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  59. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  60. 2026-10-06 10:25 UTCEG score recompute
  61. 2026-10-06 10:25 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  62. 2026-10-06 10:15 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  63. 2026-10-06 01:37 UTCEG score recompute
  64. 2026-10-06 01:37 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  65. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  66. 2026-10-05 13:27 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  67. 2026-10-05 01:17 UTCEG score recompute
  68. 2026-10-05 01:17 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  69. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  70. 2026-10-04 13:21 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  71. 2026-10-04 01:11 UTCEG score recompute
  72. 2026-10-04 01:11 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5
  73. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  74. 2026-10-03 13:12 UTCGHSA enrichmentGHSA-2mr2-j2wm-v93x · GitHub severity HIGH · GitHub CVSS 7.5

Frequently asked(5)

What is CVE-2026-49329?
CVE-2026-49329 is a high-severity vulnerability; its CVE record was published on September 1, 2026. A flaw was found in openshift/oauth-server. The OAuth login and error page endpoints pass the unauthenticated Accept-Language header to golang.org/x/text/language.ParseAcceptLanguage() without input validation. A bypass of the CVE-2022-32149 mitigation exists: the upstream guard counts only '-'…
When was CVE-2026-49329 made public?
CVE-2026-49329 was made public on August 31, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on September 1, 2026. EchelonGraph's copy of the record carries a last-modified date of October 30, 2026; the record at its source may have been updated since.
Is CVE-2026-49329 actively exploited?
CVE-2026-49329 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (54th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-49329?
CVE-2026-49329 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-49329?
A fix for CVE-2026-49329 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-49329 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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