CVE-2021-39935

CRITICALNVD 6.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-02-03), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 6.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • 1 internet-exposed host is running an affected version right now
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 36%CVSS: 6.8Exploit: cisa kev · ssvc active · epss top5pctExposed: 1

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

An issue has been discovered in GitLab CE/EE affecting all versions starting from 10.5 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. Unauthorized external users could perform Server Side Requests via the CI Lint API

Live · internet exposure

1 internet-exposed host is running an affected version of CVE-2021-39935 right now.

across 1 countries (United States)top: gitlab
See the live KEV-Exposure radar →Found passively from public internet-scan data — aggregate, host-redacted.

EchelonGraph is the only CVE feed that fuses live vulnerability intelligence with its own live internet-exposure radar — so you see not just that a CVE is exploited, but how much of the internet is exposed to it right now.

CVSS v3
6.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

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
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
36%
EPSS %ILE
98%
KEV
⚠ Exploited

Published

December 13, 2021

Last Modified

February 4, 2026

Advisory Details (3)

Auto-updated Jun 12, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-39935
generic

SSRF patch for CI Lint API is incomplete (#346187) · Issues · GitLab.org / GitLab · GitLab

https://gitlab.com/gitlab-org/gitlab/-/issues/346187
generic

2021/CVE-2021-39935.json · master · GitLab.org / GitLab CVE assignments · GitLab

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39935.json

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 59× in last 7d / 246× 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 878 total refreshes for this CVE.

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

Frequently asked(6)

What is CVE-2021-39935?
CVE-2021-39935 is a critical vulnerability published on December 13, 2021. An issue has been discovered in GitLab CE/EE affecting all versions starting from 10.5 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. Unauthorized external users could perform Server Side Requests via the CI Lint API
When was CVE-2021-39935 disclosed?
CVE-2021-39935 was first published in the National Vulnerability Database on December 13, 2021, with the most recent update on February 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-39935 actively exploited?
Yes. CISA added CVE-2021-39935 to the Known Exploited Vulnerabilities catalog on February 3, 2026, affecting GitLab Community and Enterprise Editions. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2021-39935?
CVE-2021-39935 has a CVSS v3 base score of 6.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2021-39935?
CVE-2021-39935 affects GitLab Community and Enterprise Editions. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2021-39935?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-39935, 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

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