CVE-2026-73629

HIGHPre-NVD 8.58.5—
EchelonGraph scoreHIGH confidence

Score 8.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-13. a secondary CVSS source baseline 8.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.5Exploit: None knownExposed: 0

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

Serendipity before 2.6.0 contains a server-side request forgery vulnerability in the serendipity_url_allowed() filter that fails to block hex-encoded IPv4 addresses, IPv6 literals, and link-local ranges. Authenticated users with adminImagesAdd permission can bypass the filter using alternate address formats to request internal services and retrieve response bodies through the public uploads directory.

CVSS v3
8.5
EG Score
8.5(high)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity85% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

August 13, 2026

Last Modified

August 14, 2026

Advisory Details (2)

Auto-updated Aug 13, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Serendipity before 2.6.0 SSRF via hex IPv4 and IPv6 addresses | Advisories | VulnCheck

https://www.vulncheck.com/advisories/serendipity-before-ssrf-via-hex-ipv4-and-ipv6-addresses
github Patch Available🟡 PoC Available

SSRF in Serendipity media URL import: filter bypassed via hex IPv4, IPv6, and link-local addresses · Advisory · s9y/Serendipity · GitHub

https://github.com/s9y/Serendipity/security/advisories/GHSA-2m48-gjj5-5x86

Vendor Advisories for CVE-2026-73629(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 29× 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. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-20 22:31 UTCGHSA enrichment
  3. 2026-08-20 10:18 UTCGHSA enrichment
  4. 2026-08-19 22:04 UTCEG score recompute
  5. 2026-08-19 22:04 UTCGHSA enrichment
  6. 2026-08-19 17:04 UTCEPSS rescore
  7. 2026-08-19 09:51 UTCGHSA enrichment
  8. 2026-08-18 21:38 UTCGHSA enrichment
  9. 2026-08-18 09:13 UTCGHSA enrichment
  10. 2026-08-17 20:58 UTCEG score recompute
  11. 2026-08-17 20:58 UTCGHSA enrichment
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-17 08:44 UTCGHSA enrichment
  14. 2026-08-16 20:31 UTCEG score recompute
  15. 2026-08-16 20:31 UTCGHSA enrichment
  16. 2026-08-16 14:56 UTCEPSS rescore
  17. 2026-08-16 14:56 UTCEPSS rescore
  18. 2026-08-16 08:17 UTCEG score recompute
  19. 2026-08-16 08:17 UTCGHSA enrichment
  20. 2026-08-16 02:15 UTCEPSS rescore
  21. 2026-08-15 20:04 UTCGHSA enrichment
  22. 2026-08-15 07:50 UTCEG score recompute
  23. 2026-08-15 07:50 UTCGHSA enrichment
  24. 2026-08-15 01:31 UTCEPSS rescore
  25. 2026-08-14 19:36 UTCEG score recompute
Show 9 more
  1. 2026-08-14 19:36 UTCGHSA enrichment
  2. 2026-08-14 18:34 UTCEG score recompute
  3. 2026-08-14 18:34 UTCGHSA enrichment
  4. 2026-08-14 13:00 UTCGHSA enrichment
  5. 2026-08-14 00:46 UTCGHSA enrichment
  6. 2026-08-13 12:33 UTCEG score recompute
  7. 2026-08-13 12:33 UTCGHSA enrichment
  8. 2026-08-13 11:42 UTCEG score recompute
  9. 2026-08-13 11:41 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73629?
CVE-2026-73629 is a high vulnerability published on August 13, 2026. Serendipity before 2.6.0 contains a server-side request forgery vulnerability in the serendipityurlallowed() filter that fails to block hex-encoded IPv4 addresses, IPv6 literals, and link-local ranges. Authenticated users with adminImagesAdd permission can bypass the filter using alternate address…
When was CVE-2026-73629 disclosed?
CVE-2026-73629 was first published in the National Vulnerability Database on August 13, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73629 actively exploited?
CVE-2026-73629 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 91.2% of all scored CVEs.
What is the CVSS score of CVE-2026-73629?
CVE-2026-73629 has a CVSS v3 base score of 8.5 (NVD).
How do I remediate CVE-2026-73629?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73629, 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-2026-73629

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