CVE-2023-36811

MEDIUMNVD 4.74.7—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.7 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 99% 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, nvd
4.7
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.7Exploit: NoneExposed: 0

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

borgbackup is an opensource, deduplicating archiver with compression and authenticated encryption. A flaw in the cryptographic authentication scheme in borgbackup allowed an attacker to fake archives and potentially indirectly cause backup data loss in the repository. The attack requires an attacker to be able to: 1. insert files (with no additional headers) into backups and 2. gain write access to the repository. This vulnerability does not disclose plaintext to the attacker, nor does it affect the authenticity of existing archives. Creating plausible fake archives may be feasible for empty or small archives, but is unlikely for large archives. The issue has been fixed in borgbackup 1.2.5. Users are advised to upgrade. Additionally to installing the fixed code, users must follow the upgrade procedure as documented in the change log. Data loss after being attacked can be avoided by reviewing the archives (timestamp and contents valid and as expected) after any "borg check --repair" and before "borg prune". There are no known workarounds for this vulnerability.

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
1.3%
KEV
Not listed

Published

August 30, 2023

Last Modified

November 21, 2024

References (12)

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
borgbackup0.23.0 ... 1.2.4 (82 versions)1.2.5—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 43× 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.

  1. 2026-07-23 02:24 UTCEG score recompute
  2. 2026-07-22 23:11 UTCEG score recompute
  3. 2026-07-22 14:06 UTCEPSS rescore
  4. 2026-07-21 15:23 UTCEPSS rescore
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  14. 2026-07-15 16:56 UTCEPSS rescore
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  16. 2026-07-15 11:19 UTCOSV refresh
  17. 2026-07-15 01:58 UTCEPSS rescore
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  19. 2026-07-13 22:28 UTCEPSS rescore
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  1. 2026-07-04 06:29 UTCEPSS rescore
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  4. 2026-06-30 23:21 UTCEPSS rescore
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  6. 2026-06-29 14:05 UTCEPSS rescore
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  12. 2026-06-27 11:34 UTCOSV refresh
  13. 2026-06-27 03:07 UTCEPSS rescore
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  15. 2026-06-25 13:48 UTCEPSS rescore
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  17. 2026-06-23 21:31 UTCEPSS rescore
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  19. 2026-06-21 14:55 UTCEPSS rescore
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  21. 2026-06-21 01:58 UTCEPSS rescore
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  23. 2026-06-18 17:51 UTCEPSS rescore
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  25. 2026-06-17 17:51 UTCEPSS rescore
  26. 2026-06-17 17:51 UTCEPSS rescore
  27. 2026-06-15 17:47 UTCEPSS rescore
  28. 2026-06-14 23:16 UTCEPSS rescore
  29. 2026-06-13 22:59 UTCEPSS rescore
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  31. 2026-06-12 23:10 UTCEPSS rescore
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  35. 2026-06-10 22:17 UTCEPSS rescore
  36. 2026-06-10 13:21 UTCEPSS rescore
  37. 2026-06-09 22:17 UTCOSV refresh
  38. 2026-06-08 14:16 UTCEPSS rescore
  39. 2026-06-08 14:15 UTCEPSS rescore
  40. 2026-06-07 15:23 UTCEPSS rescore
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  42. 2026-06-06 13:46 UTCEPSS rescore
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  44. 2026-06-05 22:46 UTCEPSS rescore
  45. 2026-06-05 22:46 UTCEPSS rescore
  46. 2026-06-05 06:09 UTCEPSS rescore
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  48. 2026-06-04 13:11 UTCEPSS rescore
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  50. 2026-06-02 20:12 UTCEPSS rescore
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  53. 2026-06-01 13:51 UTCEPSS rescore
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  55. 2026-05-31 22:30 UTCEPSS rescore
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  58. 2026-05-29 13:43 UTCEPSS rescore
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  60. 2026-05-28 13:43 UTCEPSS rescore
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  67. 2026-05-26 07:18 UTCEPSS rescore
  68. 2026-05-24 18:30 UTCEG score recompute
  69. 2026-05-24 16:52 UTCEPSS rescore

Frequently asked(5)

What is CVE-2023-36811?
CVE-2023-36811 is a medium vulnerability published on August 30, 2023. borgbackup is an opensource, deduplicating archiver with compression and authenticated encryption. A flaw in the cryptographic authentication scheme in borgbackup allowed an attacker to fake archives and potentially indirectly cause backup data loss in the repository. The attack requires an…
When was CVE-2023-36811 disclosed?
CVE-2023-36811 was first published in the National Vulnerability Database on August 30, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-36811 actively exploited?
CVE-2023-36811 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-36811?
CVE-2023-36811 has a CVSS v3 base score of 4.7 (NVD).
How do I remediate CVE-2023-36811?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-36811, 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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