CVE-2026-77066

MEDIUMPre-NVD 5.05.0—
EchelonGraph scoreMEDIUM confidence

Score 5.0 from GitHub Security Advisory published 2026-08-20. A secondary CVSS source baseline 5.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
5.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.0Exploit: Elevated riskExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

The scanFeedsResolver in packages/api/src/resolvers/subscriptions/index.ts passes the caller-supplied url straight to axios.get(url, rssParserConfig()) with no address validation. The same file guards the subscribe path with validateUrl(), which rejects private and reserved ranges through the private-ip library, and createPageSaveRequest applies the same check, so the omission is specific to this resolver. An authenticated user can direct the server to request arbitrary internal endpoints. The response is parsed as a feed or as HTML and the resolver returns the resulting url, title, description and type fields, so disclosure is limited to feed-shaped metadata and to link elements advertising RSS or Atom feeds; requests that do not parse still distinguish reachable ports from unreachable ones through the resulting error.

CVSS v3
5.0
EG Score
5.0MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100CISA SSVC

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
Severity50% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.3%
EPSS %ILE
14th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 20, 2026

Last Modified

September 24, 2026

Advisory Details (5)

Auto-updated Aug 20, 2026
🔬 Proof of concept available. Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

Omnivore Server-Side Request Forgery via the scanFeeds GraphQL Query | Advisories | VulnCheck

https://www.vulncheck.com/advisories/omnivore-server-side-request-forgery-via-the-scanfeeds-graphql-query
generic

GitHub - omnivore-app/omnivore: Omnivore is a complete, open source read-it-later solution for people who like reading. · GitHub

https://github.com/omnivore-app/omnivore
generic

omnivore/packages/api/src/resolvers/subscriptions/index.ts at 0d66408746788e07cec43928581b2567308ab575 · omnivore-app/omnivore · GitHub

https://github.com/omnivore-app/omnivore/blob/0d66408746788e07cec43928581b2567308ab575/packages/api/src/resolvers/subscriptions/index.ts#L445
github_commit

commit c4d7d8562e6b (omnivore-app/omnivore)

Fix landed in omnivore-app/omnivore commit c4d7d8562e6b — awaiting tagged release

https://github.com/omnivore-app/omnivore/commit/c4d7d8562e6b9aabb1d8e4dabca268e314baa43a
generic🟡 PoC Available

SSRF via scanFeeds GraphQL query · Issue #4647 · omnivore-app/omnivore · GitHub

https://github.com/omnivore-app/omnivore/issues/4647

Vendor Advisories for CVE-2026-77066(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 15× in last 7d / 77× 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.

Showing the most recent 100 of 127 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 16:29 UTCGHSA enrichment
  3. 2026-10-03 16:50 UTCEG score recompute
  4. 2026-10-03 16:50 UTCGHSA enrichment
  5. 2026-10-03 14:26 UTCEPSS rescore
  6. 2026-10-02 07:59 UTCEG score recompute
  7. 2026-10-02 07:59 UTCGHSA enrichment
  8. 2026-10-01 19:50 UTCEPSS rescore
  9. 2026-10-01 08:05 UTCEG score recompute
  10. 2026-10-01 08:05 UTCGHSA enrichment
  11. 2026-09-30 08:25 UTCEG score recompute
  12. 2026-09-30 08:25 UTCGHSA enrichment
  13. 2026-09-29 15:24 UTCEPSS rescore
  14. 2026-09-29 02:46 UTCEG score recompute
  15. 2026-09-29 02:46 UTCGHSA enrichment
  16. 2026-09-28 13:52 UTCEPSS rescore
  17. 2026-09-28 03:06 UTCEG score recompute
  18. 2026-09-28 03:06 UTCGHSA enrichment
  19. 2026-09-27 13:48 UTCEPSS rescore
  20. 2026-09-27 03:25 UTCEG score recompute
  21. 2026-09-27 03:25 UTCGHSA enrichment
  22. 2026-09-26 15:59 UTCEPSS rescore
  23. 2026-09-26 00:28 UTCEPSS rescore
  24. 2026-09-24 20:15 UTCEG score recompute
  25. 2026-09-24 20:15 UTCGHSA enrichment
Show 75 more
  1. 2026-09-24 14:58 UTCEG score recompute
  2. 2026-09-24 14:58 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-23 22:31 UTCEG score recompute
  5. 2026-09-23 22:31 UTCGHSA enrichment
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-22 22:52 UTCEG score recompute
  8. 2026-09-22 22:52 UTCGHSA enrichment
  9. 2026-09-22 16:01 UTCEPSS rescore
  10. 2026-09-21 23:12 UTCEG score recompute
  11. 2026-09-21 23:12 UTCGHSA enrichment
  12. 2026-09-21 21:09 UTCEPSS rescore
  13. 2026-09-20 23:32 UTCEG score recompute
  14. 2026-09-20 23:32 UTCGHSA enrichment
  15. 2026-09-20 20:16 UTCEPSS rescore
  16. 2026-09-19 23:28 UTCEG score recompute
  17. 2026-09-19 23:28 UTCGHSA enrichment
  18. 2026-09-18 23:48 UTCEG score recompute
  19. 2026-09-18 23:48 UTCGHSA enrichment
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-18 00:08 UTCEG score recompute
  22. 2026-09-18 00:08 UTCGHSA enrichment
  23. 2026-09-16 23:21 UTCEG score recompute
  24. 2026-09-16 23:21 UTCGHSA enrichment
  25. 2026-09-16 14:08 UTCEPSS rescore
  26. 2026-09-16 05:15 UTCEPSS rescore
  27. 2026-09-15 23:41 UTCEG score recompute
  28. 2026-09-15 23:41 UTCGHSA enrichment
  29. 2026-09-15 03:12 UTCEPSS rescore
  30. 2026-09-15 00:01 UTCGHSA enrichment
  31. 2026-09-14 00:22 UTCEG score recompute
  32. 2026-09-14 00:22 UTCGHSA enrichment
  33. 2026-09-13 00:43 UTCEG score recompute
  34. 2026-09-13 00:43 UTCGHSA enrichment
  35. 2026-09-12 15:02 UTCEPSS rescore
  36. 2026-09-12 01:04 UTCEG score recompute
  37. 2026-09-12 01:04 UTCGHSA enrichment
  38. 2026-09-11 14:53 UTCEPSS rescore
  39. 2026-09-11 01:24 UTCEG score recompute
  40. 2026-09-11 01:24 UTCGHSA enrichment
  41. 2026-09-10 09:35 UTCEPSS rescore
  42. 2026-09-10 01:45 UTCGHSA enrichment
  43. 2026-09-09 02:06 UTCEG score recompute
  44. 2026-09-09 02:06 UTCGHSA enrichment
  45. 2026-09-08 22:01 UTCEPSS rescore
  46. 2026-09-07 20:11 UTCEG score recompute
  47. 2026-09-07 20:11 UTCGHSA enrichment
  48. 2026-09-06 20:31 UTCEG score recompute
  49. 2026-09-06 20:31 UTCGHSA enrichment
  50. 2026-09-06 13:48 UTCEPSS rescore
  51. 2026-09-05 20:51 UTCEG score recompute
  52. 2026-09-05 20:51 UTCGHSA enrichment
  53. 2026-09-04 21:12 UTCEG score recompute
  54. 2026-09-04 21:12 UTCGHSA enrichment
  55. 2026-09-04 05:07 UTCEPSS rescore
  56. 2026-09-03 20:52 UTCGHSA enrichment
  57. 2026-09-02 21:12 UTCEG score recompute
  58. 2026-09-02 21:12 UTCGHSA enrichment
  59. 2026-09-02 14:12 UTCEPSS rescore
  60. 2026-09-01 19:55 UTCEG score recompute
  61. 2026-09-01 19:55 UTCGHSA enrichment
  62. 2026-09-01 13:54 UTCEPSS rescore
  63. 2026-09-01 04:40 UTCEPSS rescore
  64. 2026-09-01 04:40 UTCEPSS rescore
  65. 2026-08-31 19:39 UTCEG score recompute
  66. 2026-08-31 19:38 UTCGHSA enrichment
  67. 2026-08-30 19:18 UTCEPSS rescore
  68. 2026-08-30 19:17 UTCEPSS rescore
  69. 2026-08-30 17:31 UTCEG score recompute
  70. 2026-08-30 17:31 UTCGHSA enrichment
  71. 2026-08-30 01:22 UTCEPSS rescore
  72. 2026-08-29 17:51 UTCEG score recompute
  73. 2026-08-29 17:51 UTCGHSA enrichment
  74. 2026-08-28 21:42 UTCEPSS rescore
  75. 2026-08-28 18:09 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-77066?
CVE-2026-77066 is a medium vulnerability published on August 20, 2026. The scanFeedsResolver in packages/api/src/resolvers/subscriptions/index.ts passes the caller-supplied url straight to axios.get(url, rssParserConfig()) with no address validation. The same file guards the subscribe path with validateUrl(), which rejects private and reserved ranges through the…
When was CVE-2026-77066 disclosed?
CVE-2026-77066 was first published on August 20, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77066 actively exploited?
CVE-2026-77066 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (14th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-77066?
CVE-2026-77066 has a CVSS base score of 5.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-77066?
An upstream fix for CVE-2026-77066 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-77066 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-77066

Explore →

Is Your Infrastructure Affected by CVE-2026-77066?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs