CVE-2026-77352

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 91% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

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

Wallos is an open-source, self-hostable personal subscription tracker. From version 2.0.0 to before version 5.0.0, any authenticated Wallos user (no admin rights required) can make the server open arbitrary outbound SMTP connections to internal/link-local addresses, by setting the SMTP host of their personal email notifications to an internal IP. The per-user notification settings endpoint (endpoints/notifications/saveemailnotifications.php) performs no SSRF validation, and the notification cron (endpoints/cronjobs/sendnotifications.php) feeds that user-controlled host straight into PHPMailer ($mail->Host = $email['smtpAddress']). When the user's subscription notification fires, the server connects to the chosen host:port. This issue has been patched in version 5.0.0.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
19(Track)
EG Risk 19/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

August 31, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Aug 31, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_release.
github_release Patch Available

v5.0.0

Patch available: ellite/Wallos v5.0.0

https://github.com/ellite/Wallos/releases/tag/v5.0.0
github Patch Available🟡 PoC Available

Authenticated SSRF via per-user SMTP notification host (low-privilege user) — CWE-918 · Advisory · ellite/Wallos · GitHub

https://github.com/ellite/Wallos/security/advisories/GHSA-c75x-9vj6-57qj

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 34× 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. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-20 11:17 UTCEG score recompute
  3. 2026-09-19 12:32 UTCEG score recompute
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 13:47 UTCEG score recompute
  6. 2026-09-16 16:16 UTCEG score recompute
  7. 2026-09-16 14:08 UTCEPSS rescore
  8. 2026-09-16 05:15 UTCEPSS rescore
  9. 2026-09-15 17:26 UTCEG score recompute
  10. 2026-09-15 03:12 UTCEPSS rescore
  11. 2026-09-13 18:44 UTCEG score recompute
  12. 2026-09-12 19:58 UTCEG score recompute
  13. 2026-09-12 15:02 UTCEPSS rescore
  14. 2026-09-11 21:13 UTCEG score recompute
  15. 2026-09-11 14:53 UTCEPSS rescore
  16. 2026-09-10 22:27 UTCEG score recompute
  17. 2026-09-10 09:35 UTCEPSS rescore
  18. 2026-09-09 23:42 UTCEG score recompute
  19. 2026-09-08 22:01 UTCEPSS rescore
  20. 2026-09-08 07:13 UTCEG score recompute
  21. 2026-09-07 08:28 UTCEG score recompute
  22. 2026-09-06 13:48 UTCEPSS rescore
  23. 2026-09-06 09:39 UTCEG score recompute
  24. 2026-09-05 10:54 UTCEG score recompute
  25. 2026-09-04 12:08 UTCEG score recompute
Show 9 more
  1. 2026-09-04 05:07 UTCEPSS rescore
  2. 2026-09-02 14:34 UTCEG score recompute
  3. 2026-09-02 14:12 UTCEPSS rescore
  4. 2026-09-01 15:40 UTCEG score recompute
  5. 2026-09-01 15:04 UTCEG score recompute
  6. 2026-09-01 13:54 UTCEPSS rescore
  7. 2026-08-31 22:21 UTCEG score recompute
  8. 2026-08-31 21:30 UTCEG score recompute
  9. 2026-08-31 21:29 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-77352?
CVE-2026-77352 is a medium vulnerability published on August 31, 2026. Wallos is an open-source, self-hostable personal subscription tracker. From version 2.0.0 to before version 5.0.0, any authenticated Wallos user (no admin rights required) can make the server open arbitrary outbound SMTP connections to internal/link-local addresses, by setting the SMTP host of…
When was CVE-2026-77352 disclosed?
CVE-2026-77352 was first published in the National Vulnerability Database on August 31, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77352 actively exploited?
CVE-2026-77352 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 90.7% of all scored CVEs.
What is the CVSS score of CVE-2026-77352?
CVE-2026-77352 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-77352?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77352, 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

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