CVE-2026-41417

MEDIUMNVD 5.35.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.3% (24th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Elevated

Also known asEUVD-2026-28224 (ENISA EUVD)Source: ENISA EUVD

5.3EG
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: 0.3%CVSS: 5.3Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Netty allows request-line validation to be bypassed when a DefaultHttpRequest or DefaultFullHttpRequest is created first and its URI is later changed via setUri(). The constructors reject CRLF and whitespace characters that would break the start-line, but setUri() does not apply the same validation. HttpRequestEncoder and RtspEncoder then write the URI into the request line verbatim. If attacker-controlled input reaches setUri(), this enables CRLF injection and insertion of additional HTTP or RTSP requests, leading to HTTP request smuggling or desynchronization on the HTTP side and request injection on the RTSP side. This issue is fixed in versions 4.2.13.Final and 4.1.133.Final.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
55
EG Risk 55/100

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)
Severity53% × 45%
Impact severity (EG Severity): CVSS 5.3 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
0.3%
EPSS %ILE
24th
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 (5.3): severity, escalated by confirmed exploitation. This CVE's 5.3 is its impact severity (EG Severity), not escalated.

EG Severity
5.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.3% 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 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

May 6, 2026

Last Modified

May 11, 2026

Advisory Details (1)

Auto-updated May 11, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

Start-Line Injection in DefaultHttpRequest.setUri() Allows HTTP Request Smuggling and RTSP Request Injection · Advisory · netty/netty · GitHub

https://github.com/netty/netty/security/advisories/GHSA-v8h7-rr48-vmmv

Patch Availability(4)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhateap7-wildfly-0:7.4.25-2.GA_redhat_00001.1.el7eap2026-08-11redhat
redhatnetty-codec-http2026-08-11redhat
redhateap7-wildfly-0:7.4.25-2.GA_redhat_00001.1.el8eap2026-08-11redhat
redhateap7-wildfly-0:7.4.25-2.GA_redhat_00001.1.el9eap2026-08-11redhat

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.

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
netty1:4.1.48-10 ... 1:4.1.48-9 (16 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
netty1:4.1.48-10 ... 1:4.1.48-9 (12 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
netty1:4.1.48-10 ... 1:4.1.48-16 (8 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
netty1:4.1.48-10 ... 1:4.1.48-16 (7 versions)
  • every version on: no fix on record
—
Maven(1)
PackageVulnerable rangeFix by version rangeDependents
io.netty:netty-codec-http4.2.0.Alpha1 ... 4.2.9.Final (23 versions)
  • every version up to 4.1.133.Final: fixed in 4.1.133.Final
  • 4.2.0.Alpha1 up to 4.2.13.Final: fixed in 4.2.13.Final
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 37× 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 203 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 103 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  2. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  3. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  4. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  5. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  6. 2026-10-25 14:30 UTCEG score recompute
  7. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  8. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  9. 2026-10-23 02:21 UTCEG score recompute
  10. 2026-10-23 02:21 UTCVendor advisory
  11. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  12. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  13. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  14. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  15. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  16. 2026-10-18 03:41 UTCEG score recompute
  17. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  18. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  19. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  20. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  21. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  22. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  23. 2026-10-12 16:08 UTCEG score recompute
  24. 2026-10-11 19:50 UTCEG score recompute
  25. 2026-10-11 17:04 UTCEG score recompute
Show 75 more
  1. 2026-10-11 14:30 UTCEG score recompute
  2. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  3. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  4. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  5. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  6. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  7. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  8. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  9. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  10. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  11. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  12. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  13. 2026-09-30 08:41 UTCOSV refresh
  14. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  15. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  16. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  17. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  18. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  19. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  20. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  21. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  22. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  23. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  24. 2026-09-11 15:23 UTCOSV refresh
  25. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  26. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  27. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  28. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  29. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  30. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  31. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  32. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  33. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  34. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  35. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  36. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  37. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  38. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  39. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  40. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  41. 2026-08-23 19:43 UTCEG score recompute
  42. 2026-08-23 19:43 UTCVendor advisory
  43. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  44. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  45. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  46. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  47. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  48. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  49. 2026-08-17 12:49 UTCEG score recompute
  50. 2026-08-17 12:49 UTCVendor advisory
  51. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  52. 2026-08-16 04:47 UTCEG score recompute
  53. 2026-08-16 04:47 UTCVendor advisory
  54. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  55. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  56. 2026-08-14 03:21 UTCEG score recompute
  57. 2026-08-14 03:21 UTCVendor advisory
  58. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  59. 2026-08-12 16:55 UTCEG score recompute
  60. 2026-08-12 16:55 UTCVendor advisory
  61. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  62. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  63. 2026-08-11 08:24 UTCEG score recompute
  64. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  65. 2026-08-10 06:40 UTCEG score recompute
  66. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  67. 2026-08-09 05:04 UTCEG score recompute
  68. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  69. 2026-08-08 03:27 UTCEG score recompute
  70. 2026-08-07 01:50 UTCEG score recompute
  71. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  72. 2026-08-05 22:15 UTCEG score recompute
  73. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  74. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  75. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.3% · 23rd percentile

Frequently asked(5)

What is CVE-2026-41417?
CVE-2026-41417 is a medium-severity vulnerability; its CVE record was published on May 6, 2026. Netty allows request-line validation to be bypassed when a DefaultHttpRequest or DefaultFullHttpRequest is created first and its URI is later changed via setUri(). The constructors reject CRLF and whitespace characters that would break the start-line, but setUri() does not apply the same…
When was the CVE record for CVE-2026-41417 published?
The CVE record for CVE-2026-41417 was published on May 6, 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 May 11, 2026; the record at its source may have been updated since.
Is CVE-2026-41417 actively exploited?
CVE-2026-41417 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (24th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-41417?
CVE-2026-41417 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-41417?
A fix for CVE-2026-41417 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-41417 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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