CVE-2026-57958

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreHIGH confidence

Score 6.1 from GitHub Security Advisory published 2026-06-29. a secondary CVSS source baseline 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
6.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Mixpost through 2.6.0 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to execute arbitrary JavaScript in authenticated users' browsers by crafting malicious OAuth callback URLs with unsanitized error query parameters. Attackers can exploit the OAuth callback controller's failure to sanitize error parameters before rendering them through Laravel flash messages via the Vue v-html directive to hijack authenticated user sessions or perform unauthorized actions.

CVSS v3
6.1
EG Score
6.1(high)
EPSS
6.5%
KEV
Not listed

Published

June 29, 2026

Last Modified

June 29, 2026

Advisory Details (2)

Auto-updated Jun 29, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

Mixpost 2.6.0 - Reflected XSS via OAuth Callback Error Parameter | Advisories | VulnCheck

https://www.vulncheck.com/advisories/mixpost-reflected-xss-via-oauth-callback-error-parameter
generic🟡 PoC Available

Reflected XSS via OAuth Callback Error Parameter in Mixpost · Issue #204 · inovector/mixpost · GitHub

https://github.com/inovector/mixpost/issues/204

Vendor Advisories for CVE-2026-57958(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 24× in last 7d / 26× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-07-07 03:45 UTCEG score recompute
  2. 2026-07-07 03:44 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-06 02:15 UTCEG score recompute
  8. 2026-07-06 02:15 UTCGHSA enrichment
  9. 2026-07-05 02:31 UTCEPSS rescore
  10. 2026-07-05 02:30 UTCEPSS rescore
  11. 2026-07-05 00:53 UTCEG score recompute
  12. 2026-07-05 00:53 UTCGHSA enrichment
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-04 06:31 UTCEPSS rescore
  15. 2026-07-03 23:32 UTCEG score recompute
  16. 2026-07-03 23:31 UTCGHSA enrichment
  17. 2026-07-02 22:09 UTCEG score recompute
  18. 2026-07-02 22:09 UTCGHSA enrichment
  19. 2026-07-01 20:47 UTCEG score recompute
  20. 2026-07-01 20:47 UTCGHSA enrichment
  21. 2026-07-01 15:07 UTCEPSS rescore
  22. 2026-06-30 23:22 UTCEPSS rescore
  23. 2026-06-30 19:25 UTCEG score recompute
  24. 2026-06-30 19:25 UTCGHSA enrichment
  25. 2026-06-29 18:03 UTCEG score recompute
Show 1 more
  1. 2026-06-29 18:02 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-57958?
CVE-2026-57958 is a medium vulnerability published on June 29, 2026. Mixpost through 2.6.0 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to execute arbitrary JavaScript in authenticated users' browsers by crafting malicious OAuth callback URLs with unsanitized error query parameters. Attackers can exploit the OAuth…
When was CVE-2026-57958 disclosed?
CVE-2026-57958 was first published in the National Vulnerability Database on June 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57958 actively exploited?
CVE-2026-57958 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-57958?
CVE-2026-57958 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-57958?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57958, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-57958

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