CVE-2026-34960

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

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

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-12. A secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-29290 (ENISA EUVD) · GHSA-fqhc-8hwj-969h (GitHub Security Advisories)Source: ENISA EUVD

6.5EG
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: 0.2%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

barebox prior to version 2026.04.0 contains an out-of-bounds read vulnerability in DHCP option parsing within the dhcp_message_type() function that fails to verify the options pointer remains within received packet bounds. An attacker on the same broadcast domain can send a crafted DHCP Offer or ACK packet without a proper 0xff end marker to cause the parser to read past valid packet data and potentially crash the system.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

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)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 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 referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
EPSS PROB
0.2%
EPSS %ILE
16th
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 (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% 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 every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade 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 every mission impact level.

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

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

May 11, 2026

Last Modified

July 18, 2026

Advisory Details (3)

Auto-updated May 11, 2026
Fix referenced — no release confirmed yet.
Web page

barebox Out-of-Bounds Read in DHCP Option Parsing | Advisories | VulnCheck

https://www.vulncheck.com/advisories/barebox-out-of-bounds-read-in-dhcp-option-parsing
Web page

Release v2026.04.0 · barebox/barebox · GitHub

https://github.com/barebox/barebox/releases/tag/v2026.04.0
Web page

GitHub - barebox/barebox: The barebox bootloader - Mirror of ssh://[email protected]/barebox · GitHub

https://github.com/barebox/barebox

Vendor Advisories for CVE-2026-34960(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 36× 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 244 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 145 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 0.2% · 16th percentile
  2. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  3. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  4. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  5. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  6. 2026-10-25 14:33 UTCEG score recompute
  7. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  8. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  9. 2026-10-23 03:13 UTCEG score recompute
  10. 2026-10-23 03:12 UTCGHSA enrichmentGHSA-fqhc-8hwj-969h · GitHub severity HIGH · GitHub CVSS 6.5
  11. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  12. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  13. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  14. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  15. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  16. 2026-10-18 03:45 UTCEG score recompute
  17. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  18. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  19. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  20. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  21. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  22. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  23. 2026-10-12 16:12 UTCEG score recompute
  24. 2026-10-11 19:54 UTCEG score recompute
  25. 2026-10-11 17:07 UTCEG score recompute
Show 74 more
  1. 2026-10-11 14:34 UTCEG score recompute
  2. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  3. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  4. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  5. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  6. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  7. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  8. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  9. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  10. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  11. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  12. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  13. 2026-09-30 06:58 UTCOSV refresh
  14. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  15. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  16. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  17. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  18. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  19. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  20. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  21. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  22. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  23. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  24. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  25. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  26. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  27. 2026-09-11 11:53 UTCOSV refresh
  28. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  29. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  30. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  31. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  32. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  33. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  34. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  35. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  36. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  37. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  38. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  39. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  40. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  41. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  42. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  43. 2026-08-23 18:34 UTCEG score recompute
  44. 2026-08-23 18:34 UTCGHSA enrichmentGHSA-fqhc-8hwj-969h · GitHub severity HIGH · GitHub CVSS 6.5
  45. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  46. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  47. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  48. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  49. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  50. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  51. 2026-08-17 11:00 UTCEG score recompute
  52. 2026-08-17 11:00 UTCGHSA enrichmentGHSA-fqhc-8hwj-969h · GitHub severity HIGH · GitHub CVSS 6.5
  53. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  54. 2026-08-16 04:21 UTCEG score recompute
  55. 2026-08-16 04:21 UTCGHSA enrichmentGHSA-fqhc-8hwj-969h · GitHub severity HIGH · GitHub CVSS 6.5
  56. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  57. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  58. 2026-08-14 02:53 UTCEG score recompute
  59. 2026-08-14 02:53 UTCGHSA enrichmentGHSA-fqhc-8hwj-969h · GitHub severity HIGH · GitHub CVSS 6.5
  60. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  61. 2026-08-13 02:15 UTCEG score recompute
  62. 2026-08-13 02:15 UTCGHSA enrichmentGHSA-fqhc-8hwj-969h · GitHub severity HIGH · GitHub CVSS 6.5
  63. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  64. 2026-08-12 02:14 UTCEG score recompute
  65. 2026-08-12 02:14 UTCGHSA enrichmentGHSA-fqhc-8hwj-969h · GitHub severity HIGH · GitHub CVSS 6.5
  66. 2026-08-11 02:12 UTCEG score recompute
  67. 2026-08-11 02:12 UTCGHSA enrichmentGHSA-fqhc-8hwj-969h · GitHub severity HIGH · GitHub CVSS 6.5
  68. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  69. 2026-08-10 02:11 UTCEG score recompute
  70. 2026-08-10 02:11 UTCGHSA enrichmentGHSA-fqhc-8hwj-969h · GitHub severity HIGH · GitHub CVSS 6.5
  71. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  72. 2026-08-09 02:11 UTCEG score recompute
  73. 2026-08-09 02:11 UTCGHSA enrichmentGHSA-fqhc-8hwj-969h · GitHub severity HIGH · GitHub CVSS 6.5
  74. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 16th percentile

Frequently asked(5)

What is CVE-2026-34960?
CVE-2026-34960 is a medium-severity vulnerability; its CVE record was published on May 11, 2026. barebox prior to version 2026.04.0 contains an out-of-bounds read vulnerability in DHCP option parsing within the dhcpmessagetype() function that fails to verify the options pointer remains within received packet bounds. An attacker on the same broadcast domain can send a crafted DHCP Offer or ACK…
When was CVE-2026-34960 made public?
CVE-2026-34960 was made public on May 11, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on May 11, 2026. EchelonGraph's copy of the record carries a last-modified date of July 18, 2026; the record at its source may have been updated since.
Is CVE-2026-34960 actively exploited?
CVE-2026-34960 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (16th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-34960?
CVE-2026-34960 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-34960?
A fix for CVE-2026-34960 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2026-34960 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-34960

Explore →

Is Your Infrastructure Affected by CVE-2026-34960?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.