CVE-2026-49826

UNRATEDCVSS · not yet scored

Also known asEUVD-2026-58716 (ENISA EUVD) · GHSA-8w27-c4vc-88q9 (GitHub Security Advisories)Source: ENISA EUVD

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EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS v2: —Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Concourse is a container-based automation system written in Go. Prior to version 8.2.3, an attacker is able to craft and send a user a URL that will redirect the user from the Concourse web server to any other site. This could be used in a phishing attack to steal user's credentials. This has been fixed in 8.2.3. No known workarounds are available.

CVSS v3
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EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
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EPSS PROB
0.5%
EPSS %ILE
44th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

EG Severity
Not assessed: no CVSS publishedA missing CVSS is not a severity of zero.
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-26). 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
No SSVC decision: EchelonGraph has not assessed this CVECISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the BOD 26-04 block below.

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

July 1, 2026

Last Modified

September 18, 2026

References (3)

Vendor Advisories for CVE-2026-49826(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/concourse/concourse—
  • every version up to 1.6.1-0.20260526150512-ac60be5f0435: fixed in 1.6.1-0.20260526150512-ac60be5f0435
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Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× 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.

  1. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  2. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  3. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  4. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  5. 2026-10-27 11:01 UTCEG score recompute
  6. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  7. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  8. 2026-10-25 14:22 UTCEG score recompute
  9. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  10. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  11. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  12. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  13. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  14. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  15. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  16. 2026-10-18 03:34 UTCEG score recompute
  17. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  18. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  19. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  20. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  21. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  22. 2026-10-13 16:24 UTCOSV refresh
  23. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  24. 2026-10-12 15:59 UTCEG score recompute
  25. 2026-10-11 19:43 UTCEG score recompute
Show 53 more
  1. 2026-10-11 16:57 UTCEG score recompute
  2. 2026-10-11 14:21 UTCEG score recompute
  3. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  4. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  5. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  6. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  7. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  8. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  9. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  10. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  11. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  12. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  13. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  14. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  15. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  16. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  17. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  18. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  19. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  20. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  21. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  22. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  23. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  24. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  25. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  26. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  27. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  28. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  29. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  30. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  31. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  32. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  33. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  34. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  35. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  36. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  37. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  38. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  39. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  40. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  41. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  42. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  43. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  44. 2026-08-17 23:20 UTCEG score recompute
  45. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  46. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  47. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  48. 2026-08-14 17:33 UTCNVD update
  49. 2026-08-14 16:44 UTCMITRE cvelistV5
  50. 2026-08-01 20:39 UTCEG score recompute
  51. 2026-07-26 13:15 UTCEG score recompute
  52. 2026-07-23 03:18 UTCEG score recompute
  53. 2026-07-01 19:02 UTCEG score recompute

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Frequently asked(4)

What is CVE-2026-49826?
CVE-2026-49826 is a vulnerability whose severity is not yet rated; its CVE record was published on July 1, 2026. Concourse is a container-based automation system written in Go. Prior to version 8.2.3, an attacker is able to craft and send a user a URL that will redirect the user from the Concourse web server to any other site. This could be used in a phishing attack to steal user's credentials. This has been…
When was the CVE record for CVE-2026-49826 published?
The CVE record for CVE-2026-49826 was published on July 1, 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 September 18, 2026; the record at its source may have been updated since.
Is CVE-2026-49826 actively exploited?
CVE-2026-49826 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-49826?
A fix for CVE-2026-49826 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-49826 are linked in the Vendor Advisories panel on this page.

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