CVE-2026-48822

MEDIUMPre-NVD 5.85.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 98% 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
5.8
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.8Exploit: NoneExposed: 0

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

Shaarli is a personal bookmarking service. Versions 0.16.1 and prior contain a stored Cross-Site Scripting (XSS) vulnerability in the Markdown-to-HTML conversion process used in the Bookmark Description field. An authenticated user can inject a malicious javascript: URI inside a Markdown link. The vulnerability originates in the filterProtocols method within BookmarkMarkdownFormatter.php.This method attempts to sanitize Markdown links by filtering dangerous protocols (such as javascript:) before rendering. It uses the following regular expression: (#]\((.*?)\)#is). This regex is designed to detect inline Markdown links, but it fails to detect Markdown reference-style links because reference-style links are resolved by the Markdown parser after preprocessing. The filterProtocols method never inspects the actual URL used in these references and as a result, an attacker can supply a javascript: URI inside a reference definition. This issue has been fixed in version 0.16.2.

CVSS v3
5.8
EG Score
5.8(medium)
EPSS
2.2%
KEV
Not listed

Published

June 17, 2026

Last Modified

June 18, 2026

Advisory Details (2)

Auto-updated Jun 17, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github.
github Patch Available🟡 PoC Available

Stored Cross-Site Scripting (XSS) via Markdown Reference Links · Advisory · shaarli/Shaarli · GitHub

https://github.com/shaarli/Shaarli/security/advisories/GHSA-2hgr-63wv-x462
github_release Patch Available

v0.16.2

Patch available: shaarli/Shaarli v0.16.2

https://github.com/shaarli/Shaarli/releases/tag/v0.16.2

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 63× 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. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 13:06 UTCEG score recompute
  3. 2026-07-15 02:00 UTCEPSS rescore
  4. 2026-07-14 12:18 UTCEG score recompute
  5. 2026-07-13 22:30 UTCEPSS rescore
  6. 2026-07-13 13:33 UTCEG score recompute
  7. 2026-07-12 14:48 UTCEG score recompute
  8. 2026-07-12 05:46 UTCEPSS rescore
  9. 2026-07-11 16:03 UTCEG score recompute
  10. 2026-07-11 08:27 UTCEPSS rescore
  11. 2026-07-10 17:17 UTCEG score recompute
  12. 2026-07-09 19:10 UTCEPSS rescore
  13. 2026-07-09 18:26 UTCEG score recompute
  14. 2026-07-08 19:34 UTCEG score recompute
  15. 2026-07-08 15:16 UTCEPSS rescore
  16. 2026-07-07 20:44 UTCEG score recompute
  17. 2026-07-07 13:46 UTCEPSS rescore
  18. 2026-07-06 21:58 UTCEG score recompute
  19. 2026-07-06 16:27 UTCEPSS rescore
  20. 2026-07-05 23:13 UTCEG score recompute
  21. 2026-07-05 02:30 UTCEPSS rescore
  22. 2026-07-05 00:28 UTCEG score recompute
  23. 2026-07-04 01:43 UTCEG score recompute
  24. 2026-07-03 02:49 UTCEG score recompute
  25. 2026-07-02 04:04 UTCEG score recompute
Show 38 more
  1. 2026-07-01 15:07 UTCEPSS rescore
  2. 2026-07-01 05:18 UTCEG score recompute
  3. 2026-06-30 23:22 UTCEPSS rescore
  4. 2026-06-30 06:33 UTCEG score recompute
  5. 2026-06-29 14:06 UTCEPSS rescore
  6. 2026-06-29 14:06 UTCEPSS rescore
  7. 2026-06-29 07:44 UTCEG score recompute
  8. 2026-06-28 14:07 UTCEPSS rescore
  9. 2026-06-28 08:56 UTCEG score recompute
  10. 2026-06-28 04:56 UTCEPSS rescore
  11. 2026-06-28 04:56 UTCEPSS rescore
  12. 2026-06-27 10:12 UTCEG score recompute
  13. 2026-06-27 03:08 UTCEPSS rescore
  14. 2026-06-26 11:27 UTCEG score recompute
  15. 2026-06-25 13:49 UTCEPSS rescore
  16. 2026-06-25 11:40 UTCEG score recompute
  17. 2026-06-24 14:05 UTCEPSS rescore
  18. 2026-06-24 12:55 UTCEG score recompute
  19. 2026-06-23 21:33 UTCEPSS rescore
  20. 2026-06-23 21:33 UTCEPSS rescore
  21. 2026-06-23 14:08 UTCEG score recompute
  22. 2026-06-22 15:08 UTCEG score recompute
  23. 2026-06-22 14:25 UTCEPSS rescore
  24. 2026-06-22 14:25 UTCEPSS rescore
  25. 2026-06-21 16:21 UTCEG score recompute
  26. 2026-06-21 14:56 UTCEPSS rescore
  27. 2026-06-21 14:56 UTCEPSS rescore
  28. 2026-06-21 01:59 UTCEPSS rescore
  29. 2026-06-21 01:59 UTCEPSS rescore
  30. 2026-06-20 17:35 UTCEG score recompute
  31. 2026-06-19 19:26 UTCEPSS rescore
  32. 2026-06-19 19:26 UTCEPSS rescore
  33. 2026-06-19 18:50 UTCEG score recompute
  34. 2026-06-18 20:02 UTCEG score recompute
  35. 2026-06-18 17:52 UTCEPSS rescore
  36. 2026-06-18 17:52 UTCEPSS rescore
  37. 2026-06-17 21:16 UTCEG score recompute
  38. 2026-06-17 21:16 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-48822?
CVE-2026-48822 is a medium vulnerability published on June 17, 2026. Shaarli is a personal bookmarking service. Versions 0.16.1 and prior contain a stored Cross-Site Scripting (XSS) vulnerability in the Markdown-to-HTML conversion process used in the Bookmark Description field. An authenticated user can inject a malicious javascript: URI inside a Markdown link. The…
When was CVE-2026-48822 disclosed?
CVE-2026-48822 was first published in the National Vulnerability Database on June 17, 2026, with the most recent update on June 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48822 actively exploited?
CVE-2026-48822 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-48822?
CVE-2026-48822 has a CVSS v3 base score of 5.8 (NVD).
How do I remediate CVE-2026-48822?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48822, 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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