CVE-2026-52811

CRITICALPre-NVD 9.09.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 60% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
9.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Gogs is an open source self-hosted Git service. Prior to 0.14.3, (*Repository).UploadRepoFiles checks for symlinks only on the leaf of the upload target (osx.IsSymlink(targetPath)). The siblings UpdateRepoFile, DeleteRepoFile, and GetDiffPreview use hasSymlinkInPath, which lstats every component — UploadRepoFiles is the lone outlier. An attacker with repo-write access plus a multipart upload whose filename contains a literal backslash (preserved by filepath.Base on Linux, then converted to / by pathx.Clean) redirects the write through a previously-committed directory symlink. iox.CopyFile opens the destination with os.Create (no O_NOFOLLOW), so the kernel follows the parent symlink and writes attacker bytes anywhere the gogs UID can write — ~git/.ssh/authorized_keys → SSH foothold, or .git/hooks/post-receive → next-push RCE. This vulnerability is fixed in 0.14.3.

CVSS v3
9.0
EG Score
9.0CRITICALmedium confidence
EG Risk
45
EG Risk 45/100

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
Severity90% × 45%
Exploitation0% × 40%
Automatability30% × 15%
EPSS PROB
0.5%
EPSS %ILE
39th
KEV
Not listed

Published

June 23, 2026

Last Modified

June 26, 2026

Advisory Details (4)

Auto-updated Jun 24, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_pr, github_release, github.
githubMentions a patch (unverified)🟡 PoC Available

UploadRepoFiles writes outside repo working tree via committed parent sym · Advisory · gogs/gogs · GitHub

https://github.com/gogs/gogs/security/advisories/GHSA-89mr-xqfv-758m
github_release Patch Available

0.14.3

Patch available: gogs/gogs v0.14.3

https://github.com/gogs/gogs/releases/tag/v0.14.3
github_pr

security: walk full upload path for symlinks

Fix merged in gogs/gogs PR #8332 on 2026-06-07 — awaiting tagged release

https://github.com/gogs/gogs/pull/8332
github_commit

commit 04cb8afbb01d (gogs/gogs)

Fix landed in gogs/gogs commit 04cb8afbb01d — awaiting tagged release

https://github.com/gogs/gogs/commit/04cb8afbb01d855454e59977a1cdbf522ea1db31

Vendor Advisories for CVE-2026-52811(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
gogs.io/gogs—
  • every version up to 0.14.3: fixed in 0.14.3
  • every version on: no fix on record
—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 27× 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 141 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-52811?
CVE-2026-52811 is a critical vulnerability published on June 23, 2026. Gogs is an open source self-hosted Git service. Prior to 0.14.3, (*Repository).UploadRepoFiles checks for symlinks only on the leaf of the upload target (osx.IsSymlink(targetPath)). The siblings UpdateRepoFile, DeleteRepoFile, and GetDiffPreview use hasSymlinkInPath, which lstats every component —…
When was CVE-2026-52811 disclosed?
CVE-2026-52811 was first published on June 23, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52811 actively exploited?
CVE-2026-52811 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-52811?
CVE-2026-52811 has a CVSS base score of 9.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-52811?
A fix for CVE-2026-52811 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-52811 are linked in the Vendor Advisories panel on this page.

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