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
Trending — 3 sources updated this week
4.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.7Exploit: None knownExposed: 0

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

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
4.7(medium)
EG Risk
21(Track)
EG Risk 21/100SSVC: 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
Severity47% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

June 29, 2026

Last Modified

July 14, 2026

Advisory Details (3)

Auto-updated Jun 29, 2026
No patch confirmed 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 17× in last 7d / 80× 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 145 total refreshes for this CVE.

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

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 in the National Vulnerability Database 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% probability of exploitation in the next 30 days, which ranks it in the top 63.9% of all scored CVEs.
What is the CVSS score of CVE-2026-57957?
CVE-2026-57957 has a CVSS v3 base score of 4.7 (NVD).
How do I remediate CVE-2026-57957?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57957, 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-2026-57957

Explore →

Is Your Infrastructure Affected by CVE-2026-57957?

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

Start Free Scan →Browse All CVEs