CVE-2026-41246

HIGHPre-NVD 8.18.1
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.8% (56th 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
Trending — 3 sources updated this week
8.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Contour is a Kubernetes ingress controller using Envoy proxy. From v1.19.0 to before v1.33.4, v1.32.5, and v1.31.6, Contour's Cookie Rewriting feature is vulnerable to Lua code injection. An attacker with RBAC permissions to create or modify HTTPProxy resources can craft a malicious value in spec.routes[].cookieRewritePolicies[].pathRewrite.value or spec.routes[].services[].cookieRewritePolicies[].pathRewrite.value that results in arbitrary code execution in the Envoy proxy. The cookie rewriting feature is internally implemented using Envoy's HTTP Lua filter. User-controlled values are interpolated into Lua source code using Go text/template without sufficient sanitization. The injected code only executes when processing traffic on the attacker's own route, which they already control. However, since Envoy runs as shared infrastructure, the injected code can also read Envoy's xDS client credentials from the filesystem or cause denial of service for other tenants sharing the Envoy instance. This vulnerability is fixed in v1.33.4, v1.32.5, and v1.31.6.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100

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)
Severity81% × 45%
The EG Score, 8.1 of 10.
Exploitation0.8% × 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 every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (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.
EPSS PROB
0.8%
EPSS %ILE
56th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (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)60 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 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

April 23, 2026

Last Modified

July 15, 2026

Advisory Details (4)

Auto-updated May 5, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

Lua code injection via Cookie Path Rewrite Policy · Advisory · projectcontour/contour · GitHub

https://github.com/projectcontour/contour/security/advisories/GHSA-x4mj-7f9g-29h4
Web page

Release v1.33.4 · projectcontour/contour · GitHub

https://github.com/projectcontour/contour/releases/tag/v1.33.4
Web page

Release v1.32.5 · projectcontour/contour · GitHub

https://github.com/projectcontour/contour/releases/tag/v1.32.5
Web page

Release v1.31.6 · projectcontour/contour · GitHub

https://github.com/projectcontour/contour/releases/tag/v1.31.6

Vendor Advisories for CVE-2026-41246(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)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/projectcontour/contour—
  • 1.19.0 up to 1.31.6: fixed in 1.31.6
  • 1.32.0 up to 1.32.5: fixed in 1.32.5
  • 1.33.0 up to 1.33.4: fixed in 1.33.4
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 26× 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 179 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 80 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  2. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  3. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  4. 2026-10-13 23:24 UTCOSV refresh
  5. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  6. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  7. 2026-10-12 16:08 UTCEG score recompute
  8. 2026-10-11 19:51 UTCEG score recompute
  9. 2026-10-11 17:04 UTCEG score recompute
  10. 2026-10-11 14:30 UTCEG score recompute
  11. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  12. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  13. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  14. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  15. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  16. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  17. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  18. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  21. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  22. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  23. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  24. 2026-09-23 08:53 UTCOSV refresh
  25. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 41st percentile
Show 74 more
  1. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  2. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  3. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  4. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  5. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  6. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  7. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  8. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  9. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  10. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  11. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  12. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  13. 2026-09-04 03:29 UTCOSV refresh
  14. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  15. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  16. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  17. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  18. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  19. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  20. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  21. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  22. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  23. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  24. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  25. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  26. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  27. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  28. 2026-08-17 14:57 UTCEG score recompute
  29. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  30. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  31. 2026-08-16 05:53 UTCEG score recompute
  32. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  33. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  34. 2026-08-14 04:13 UTCEG score recompute
  35. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  36. 2026-08-12 17:57 UTCEG score recompute
  37. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  38. 2026-08-11 16:43 UTCEG score recompute
  39. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  40. 2026-08-11 02:13 UTCEG score recompute
  41. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  42. 2026-08-09 14:43 UTCEG score recompute
  43. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  44. 2026-08-09 03:25 UTCEG score recompute
  45. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  46. 2026-08-07 23:56 UTCEG score recompute
  47. 2026-08-06 21:32 UTCEG score recompute
  48. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  49. 2026-08-05 22:59 UTCEG score recompute
  50. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  51. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  52. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  53. 2026-08-03 21:09 UTCEG score recompute
  54. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  55. 2026-08-02 11:32 UTCEG score recompute
  56. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  57. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  58. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  59. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  60. 2026-07-28 15:36 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  61. 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  62. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  63. 2026-07-25 14:18 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  64. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  65. 2026-07-23 14:18 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  66. 2026-07-23 03:11 UTCEG score recompute
  67. 2026-07-22 14:08 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  68. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  69. 2026-07-20 17:08 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  70. 2026-07-20 14:02 UTCOSV refresh
  71. 2026-07-19 02:29 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  72. 2026-07-18 10:04 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  73. 2026-07-16 17:03 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  74. 2026-07-15 16:57 UTCEPSS rescoreEPSS 0.5% · 38th percentile

Related CVEs(same product + same CWE)

Same product

2 shown

Go:github.com/projectcontour/contour

Frequently asked(5)

What is CVE-2026-41246?
CVE-2026-41246 is a high-severity vulnerability; its CVE record was published on April 23, 2026. Contour is a Kubernetes ingress controller using Envoy proxy. From v1.19.0 to before v1.33.4, v1.32.5, and v1.31.6, Contour's Cookie Rewriting feature is vulnerable to Lua code injection. An attacker with RBAC permissions to create or modify HTTPProxy resources can craft a malicious value in…
When was the CVE record for CVE-2026-41246 published?
The CVE record for CVE-2026-41246 was published on April 23, 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-2026-41246 actively exploited?
CVE-2026-41246 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (56th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-41246?
CVE-2026-41246 has a CVSS base score of 8.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-41246?
A fix for CVE-2026-41246 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-41246 are linked in the Vendor Advisories panel on this page.

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