CVE-2026-55168

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 56% 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
Elevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 6.5Exploit: Elevated riskExposed: 0

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

Runtipi is a personal homeserver orchestrator. In 4.10.0 and earlier, Runtipi accepts symbolic links from an attacker-controlled backup archive and copies them into live application paths during the backup restore flow. An authenticated attacker can plant user-config/app.env as a symlink to an arbitrary reachable path and then send PUT /api/user-config/demoapp3:_user with attacker-controlled appEnv content. FilesystemService.writeTextFile() follows the planted link, allowing content to be written outside the intended restore and user-config directory boundary with Runtipi process permissions. This issue is fixed in version 4.10.1.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
45(Track*)
EG Risk 45/100SSVC: 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
Severity65% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

August 21, 2026

Last Modified

August 25, 2026

Advisory Details (4)

Auto-updated Aug 21, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

v4.10.1

Patch available: runtipi/runtipi v4.10.1

https://github.com/runtipi/runtipi/releases/tag/v4.10.1
github_commit Patch Available

commit df529a211b05 (runtipi/runtipi)

Patch available: runtipi/runtipi v4.10.1-beta.1 (contains commit df529a211b05)

https://github.com/runtipi/runtipi/commit/df529a211b05f3a0007b209b6c337f8c1942619c
github_pr Patch Available

fix: harden backup restore against unsafe symlinks

Patch available: runtipi/runtipi v4.10.1-beta.1 (PR #2606 merged 2026-06-01)

https://github.com/runtipi/runtipi/pull/2606
github Patch Available🟡 PoC Available

Authenticated arbitrary file write via backup restore symlink planting · Advisory · runtipi/runtipi · GitHub

https://github.com/runtipi/runtipi/security/advisories/GHSA-wcrf-g9p9-2wg7

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 47× 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. 2026-09-18 21:37 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-17 21:16 UTCEG score recompute
  4. 2026-09-17 19:31 UTCEPSS rescore
  5. 2026-09-16 21:39 UTCEG score recompute
  6. 2026-09-16 14:08 UTCEPSS rescore
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-15 21:40 UTCEG score recompute
  9. 2026-09-15 03:11 UTCEPSS rescore
  10. 2026-09-13 22:49 UTCEG score recompute
  11. 2026-09-13 16:47 UTCEPSS rescore
  12. 2026-09-12 23:25 UTCEG score recompute
  13. 2026-09-12 00:00 UTCEG score recompute
  14. 2026-09-11 14:53 UTCEPSS rescore
  15. 2026-09-11 00:35 UTCEG score recompute
  16. 2026-09-10 09:35 UTCEPSS rescore
  17. 2026-09-09 01:45 UTCEG score recompute
  18. 2026-09-08 22:01 UTCEPSS rescore
  19. 2026-09-07 16:01 UTCEPSS rescore
  20. 2026-09-06 14:39 UTCEG score recompute
  21. 2026-09-06 13:47 UTCEPSS rescore
  22. 2026-09-04 15:50 UTCEG score recompute
  23. 2026-09-04 05:06 UTCEPSS rescore
  24. 2026-09-02 17:01 UTCEG score recompute
  25. 2026-09-02 14:12 UTCEPSS rescore
Show 22 more
  1. 2026-09-01 17:32 UTCEG score recompute
  2. 2026-09-01 13:54 UTCEPSS rescore
  3. 2026-09-01 04:40 UTCEPSS rescore
  4. 2026-08-31 18:06 UTCEG score recompute
  5. 2026-08-30 19:17 UTCEPSS rescore
  6. 2026-08-30 17:03 UTCEG score recompute
  7. 2026-08-30 01:22 UTCEPSS rescore
  8. 2026-08-29 17:38 UTCEG score recompute
  9. 2026-08-28 21:41 UTCEPSS rescore
  10. 2026-08-27 18:18 UTCEG score recompute
  11. 2026-08-27 14:25 UTCEPSS rescore
  12. 2026-08-26 17:52 UTCEG score recompute
  13. 2026-08-26 14:46 UTCEPSS rescore
  14. 2026-08-25 17:26 UTCEG score recompute
  15. 2026-08-25 17:15 UTCEG score recompute
  16. 2026-08-25 13:49 UTCEPSS rescore
  17. 2026-08-24 19:36 UTCEG score recompute
  18. 2026-08-23 20:12 UTCEG score recompute
  19. 2026-08-23 00:19 UTCEPSS rescore
  20. 2026-08-21 21:24 UTCEG score recompute
  21. 2026-08-21 20:44 UTCEG score recompute
  22. 2026-08-21 20:44 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-55168?
CVE-2026-55168 is a medium vulnerability published on August 21, 2026. Runtipi is a personal homeserver orchestrator. In 4.10.0 and earlier, Runtipi accepts symbolic links from an attacker-controlled backup archive and copies them into live application paths during the backup restore flow. An authenticated attacker can plant user-config/app.env as a symlink to an…
When was CVE-2026-55168 disclosed?
CVE-2026-55168 was first published in the National Vulnerability Database on August 21, 2026, with the most recent update on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55168 actively exploited?
CVE-2026-55168 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 56.4% of all scored CVEs.
What is the CVSS score of CVE-2026-55168?
CVE-2026-55168 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-55168?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55168, 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.

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