CVE-2026-26953

MEDIUMNVD 5.45.4
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.4 under NVD CVSS v3. EPSS exploit probability: 0.3% (27th 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

Also known asEUVD-2026-8425 (ENISA EUVD)Source: ENISA EUVD

5.4EG
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: 0.3%CVSS: 5.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. Versions 6.0 and above have a Stored HTML Injection vulnerability in the active sessions table located on the API settings page, allowing an attacker with valid credentials to inject arbitrary HTML code that will be rendered in the browser of any administrator who visits the active sessions page. The rowCallback function contains the value data.x_forwarded_for, which is directly concatenated into an HTML string and inserted into the DOM using jQuery’s .html() method. This method interprets the content as HTML, which means that any HTML tags present in the value will be parsed and rendered by the browser. An attacker can use common tools such as curl, wget, Python requests, Burp Suite, or even JavaScript fetch() to send an authentication request with an X-Forwarded-For header that contains malicious HTML code instead of a legitimate IP address. Since Pi-hole implements a Content Security Policy (CSP) that blocks inline JavaScript, the impact is limited to pure HTML injection without the ability to execute scripts. This issue has been fixed in version 6.4.1.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100

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)
Severity54% × 45%
Impact severity (EG Severity): CVSS 5.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 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
0.3%
EPSS %ILE
27th
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 (5.4): severity, escalated by confirmed exploitation. This CVE's 5.4 is its impact severity (EG Severity), not escalated.

EG Severity
5.4 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 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, and whom BOD 26-04 binds: 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 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.

The score's inputs: 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

February 19, 2026

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Aug 10, 2026
Patch available. Sources: github_commit, github_release, github.
GitHub advisoryMentions a patch (unverified)

Stored HTML Injection in Pi-hole Web Interface via X-Forwarded-For Header in Active Sessions Table · Advisory · pi-hole/web · GitHub

https://github.com/pi-hole/web/security/advisories/GHSA-8rw8-vjgp-rwj6
GitHub release Patch Available

v6.4.1

Patch available: pi-hole/web v6.4.1

https://github.com/pi-hole/web/releases/tag/v6.4.1
GitHub commit Patch Available

commit 1a0c6f4fe6d0 (pi-hole/web)

Patch available: pi-hole/web v6.4.1 (contains commit 1a0c6f4fe6d0)

https://github.com/pi-hole/web/commit/1a0c6f4fe6d0116fd2846b2adaae95996b7f194d

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 39× 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 97 of 100 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. 3 repeat rows among the latest 100 are merged into the row they repeat. The 3 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  2. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  3. 2026-10-31 00:55 UTCOSV refresh
  4. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  5. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  6. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  7. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  8. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  9. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  10. 2026-10-25 14:39 UTCEG score recompute
  11. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  12. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  13. 2026-10-23 04:27 UTCEG score recompute
  14. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  15. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  16. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  17. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  18. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  19. 2026-10-18 03:51 UTCEG score recompute
  20. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  21. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  22. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  23. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  24. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  25. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
Show 72 more
  1. 2026-10-12 16:18 UTCEG score recompute
  2. 2026-10-11 20:00 UTCEG score recompute
  3. 2026-10-11 17:13 UTCEG score recompute
  4. 2026-10-11 14:45 UTCEG score recompute
  5. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  6. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  7. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  8. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  9. 2026-10-08 14:54 UTCOSV refresh
  10. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  11. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  12. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  13. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  14. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  15. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  16. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  17. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  18. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  19. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  20. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  21. 2026-09-18 20:36 UTCOSV refresh
  22. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  23. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  24. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  25. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  26. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  27. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  28. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  29. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  30. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  31. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  32. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  33. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  34. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  35. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  36. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  37. 2026-08-30 23:23 UTCOSV refresh
  38. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  39. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  40. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  41. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  42. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  43. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  44. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  45. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  46. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  47. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  48. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  49. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  50. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  51. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  52. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  53. 2026-08-14 09:31 UTCEG score recompute
  54. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  55. 2026-08-13 01:41 UTCEG score recompute
  56. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  57. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  58. 2026-08-11 08:45 UTCEG score recompute
  59. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  60. 2026-08-10 09:29 UTCEG score recompute
  61. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  62. 2026-08-07 21:21 UTCEG score recompute
  63. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  64. 2026-08-06 03:24 UTCEG score recompute
  65. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  66. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  67. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  68. 2026-08-02 20:04 UTCEG score recompute
  69. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  70. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  71. 2026-07-30 16:27 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  72. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.3% · 21st percentile

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-26953?
CVE-2026-26953 is a medium-severity vulnerability; its CVE record was published on February 19, 2026. Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. Versions 6.0 and above have a Stored HTML Injection vulnerability in the active sessions table located on the API settings page, allowing an attacker with valid credentials…
When was the CVE record for CVE-2026-26953 published?
The CVE record for CVE-2026-26953 was published on February 19, 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 June 17, 2026; the record at its source may have been updated since.
Is CVE-2026-26953 actively exploited?
CVE-2026-26953 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (27th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-26953?
CVE-2026-26953 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-26953?
A fix for CVE-2026-26953 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-26953

Explore →

Is Your Infrastructure Affected by CVE-2026-26953?

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

Book a Demo →Browse All CVEs