CVE-2026-57957

MEDIUMPre-NVD 4.74.7—
EchelonGraph scoreMEDIUM confidence

Score 4.7 from GitHub Security Advisory (severity: LOW) published 2026-06-29. a secondary CVSS source baseline 4.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
4.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 4.7Exploit: None knownExposed services: Not assessed

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

Papermark through 0.22.0 contains a cross-origin resource sharing (CORS) misconfiguration vulnerability that allows unauthenticated remote attackers to perform credentialed cross-origin requests by exploiting the TUS-based viewer upload endpoint reflecting arbitrary request Origins with Access-Control-Allow-Credentials set to true. Attackers can lure authenticated victims to malicious pages that silently issue credentialed cross-origin requests to upload arbitrary files into victim datarooms and read credentialed responses.

CVSS v3
4.7
EG Score
4.7MEDIUMmedium confidence
EG Risk
21
EG Risk 21/100

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
Severity47% × 45%
Exploitation0% × 40%
Automatability0% × 15%
EPSS PROB
0.4%
EPSS %ILE
35th
KEV
Not listed

Published

June 29, 2026

Last Modified

July 14, 2026

Advisory Details (3)

Auto-updated Jun 29, 2026
No fix on record yet. Sources: github_pr.
generic

Papermark 0.22.0 - CORS Misconfiguration in Viewer Upload Endpoint | Advisories | VulnCheck

https://www.vulncheck.com/advisories/papermark-cors-misconfiguration-in-viewer-upload-endpoint
generic

CORS Misconfiguration on Viewer Upload Endpoint · Issue #2178 · papermark/papermark · GitHub

https://github.com/papermark/papermark/issues/2178
github_pr

White-box bug bounty: task-whitebox-papermark

Upstream fix in progress (PR #1 · AstoKr/papermark, state=open)

https://github.com/AstoKr/papermark/pull/1

Vendor Advisories for CVE-2026-57957(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 7× in last 7d / 32× 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 196 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-57957?
CVE-2026-57957 is a medium vulnerability published on June 29, 2026. Papermark through 0.22.0 contains a cross-origin resource sharing (CORS) misconfiguration vulnerability that allows unauthenticated remote attackers to perform credentialed cross-origin requests by exploiting the TUS-based viewer upload endpoint reflecting arbitrary request Origins with…
When was CVE-2026-57957 disclosed?
CVE-2026-57957 was first published on June 29, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57957 actively exploited?
CVE-2026-57957 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (35th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-57957?
CVE-2026-57957 has a CVSS base score of 4.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-57957?
No fix for CVE-2026-57957 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-57957 are linked in the Vendor Advisories panel on this page.

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