CVE-2026-33056

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 69% 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
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

tar-rs is a tar archive reading/writing library for Rust. In versions 0.4.44 and below, when unpacking a tar archive, the tar crate's unpack_dir function uses fs::metadata() to check whether a path that already exists is a directory. Because fs::metadata() follows symbolic links, a crafted tarball containing a symlink entry followed by a directory entry with the same name causes the crate to treat the symlink target as a valid existing directory — and subsequently apply chmod to it. This allows an attacker to modify the permissions of arbitrary directories outside the extraction root. This issue has been fixed in version 0.4.45.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

March 20, 2026

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Aug 4, 2026
Patch available. Sources: github_commit, github.
github Patch Available

`unpack_in` can chmod arbitrary directories by following symlinks · Advisory · composefs/tar-rs · GitHub

https://github.com/alexcrichton/tar-rs/security/advisories/GHSA-j4xf-2g29-59ph
github_commit Patch Available

commit 17b1fd84e632 (alexcrichton/tar-rs)

Patch available: alexcrichton/tar-rs 0.4.46 (contains commit 17b1fd84e632)

https://github.com/alexcrichton/tar-rs/commit/17b1fd84e632071cb8eef9d3709bf347bd266446

Vendor Advisories for CVE-2026-33056(1)

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

Affected Packages

(14 across 10 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
rustc1.48.0+dfsg1-2 ... 1.96.0+dfsg1-1~exp1 (200 versions)——
rust-tar0.4.26-1 ... 0.4.45-2 (14 versions)——
Debian:12(2)
PackageVulnerable rangeFixed inDependents
rustc1.63.0+dfsg1-2 ... 1.96.0+dfsg1-1~exp1 (144 versions)——
rust-tar0.4.38-1 ... 0.4.45-2 (10 versions)——
Debian:13(2)
PackageVulnerable rangeFixed inDependents
rustc1.85.0+dfsg3-1 ... 1.96.0+dfsg1-1~exp1 (50 versions)——
rust-tar0.4.43-4, 0.4.44-1, 0.4.45-1, 0.4.45-2——
Debian:14(2)
PackageVulnerable rangeFixed inDependents
rustc1.85.0+dfsg3-1 ... 1.92.0+dfsg1-2~bpo13+1 (34 versions)1.92.0+dfsg1-2—
rust-tar0.4.43-4, 0.4.44-10.4.45-1—
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
rust—1.78.0-r1—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
rust—1.83.0-r1—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
rust—1.87.0-r1—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
rust—1.91.1-r1—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
rust—1.94.0-r1—
crates.io(1)
PackageVulnerable rangeFixed inDependents
tar—0.4.45—

Weakness Classification(1)

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

Additional Vendor Advisories

(5)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 7× in last 7d / 30× 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. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-17 19:30 UTCEPSS rescore
  4. 2026-09-16 14:08 UTCEPSS rescore
  5. 2026-09-16 05:15 UTCEPSS rescore
  6. 2026-09-13 16:47 UTCEPSS rescore
  7. 2026-09-12 15:01 UTCEPSS rescore
  8. 2026-09-11 14:52 UTCEPSS rescore
  9. 2026-09-10 09:34 UTCEPSS rescore
  10. 2026-09-08 22:00 UTCEPSS rescore
  11. 2026-09-07 16:01 UTCEPSS rescore
  12. 2026-09-06 13:47 UTCEPSS rescore
  13. 2026-09-06 13:47 UTCEPSS rescore
  14. 2026-09-04 05:06 UTCEPSS rescore
  15. 2026-09-02 17:08 UTCOSV refresh
  16. 2026-09-02 14:11 UTCEPSS rescore
  17. 2026-09-01 13:53 UTCEPSS rescore
  18. 2026-09-01 04:39 UTCEPSS rescore
  19. 2026-09-01 04:39 UTCEPSS rescore
  20. 2026-08-30 19:17 UTCEPSS rescore
  21. 2026-08-30 01:22 UTCEPSS rescore
  22. 2026-08-28 21:41 UTCEPSS rescore
  23. 2026-08-27 14:25 UTCEPSS rescore
  24. 2026-08-26 14:46 UTCEPSS rescore
  25. 2026-08-25 13:49 UTCEPSS rescore
Show 49 more
  1. 2026-08-24 14:17 UTCEPSS rescore
  2. 2026-08-23 00:19 UTCEPSS rescore
  3. 2026-08-21 23:49 UTCEPSS rescore
  4. 2026-08-20 22:55 UTCEPSS rescore
  5. 2026-08-20 22:55 UTCEPSS rescore
  6. 2026-08-19 17:03 UTCEPSS rescore
  7. 2026-08-18 13:48 UTCEPSS rescore
  8. 2026-08-17 13:47 UTCEPSS rescore
  9. 2026-08-16 14:56 UTCEPSS rescore
  10. 2026-08-16 11:03 UTCEG score recompute
  11. 2026-08-16 11:03 UTCVendor advisory
  12. 2026-08-16 02:14 UTCEPSS rescore
  13. 2026-08-15 01:30 UTCEPSS rescore
  14. 2026-08-14 07:14 UTCEG score recompute
  15. 2026-08-14 07:14 UTCVendor advisory
  16. 2026-08-13 22:00 UTCEPSS rescore
  17. 2026-08-12 21:54 UTCEG score recompute
  18. 2026-08-12 21:54 UTCVendor advisory
  19. 2026-08-12 13:50 UTCEPSS rescore
  20. 2026-08-11 04:26 UTCEG score recompute
  21. 2026-08-11 04:26 UTCVendor advisory
  22. 2026-08-11 00:00 UTCEPSS rescore
  23. 2026-08-10 05:16 UTCEG score recompute
  24. 2026-08-10 05:16 UTCVendor advisory
  25. 2026-08-09 13:46 UTCEPSS rescore
  26. 2026-08-09 06:47 UTCEG score recompute
  27. 2026-08-09 06:47 UTCVendor advisory
  28. 2026-08-08 16:37 UTCEPSS rescore
  29. 2026-08-07 17:17 UTCEG score recompute
  30. 2026-08-07 17:17 UTCVendor advisory
  31. 2026-08-06 13:46 UTCEPSS rescore
  32. 2026-08-06 01:29 UTCEG score recompute
  33. 2026-08-06 01:29 UTCVendor advisory
  34. 2026-08-05 19:17 UTCEPSS rescore
  35. 2026-08-04 15:10 UTCEPSS rescore
  36. 2026-08-04 10:38 UTCEPSS rescore
  37. 2026-08-04 00:37 UTCEG score recompute
  38. 2026-08-04 00:37 UTCVendor advisory
  39. 2026-08-03 10:36 UTCEPSS rescore
  40. 2026-08-02 16:14 UTCEG score recompute▲ 1.40
  41. 2026-08-02 16:14 UTCVendor advisory
  42. 2026-08-02 02:27 UTCEPSS rescore
  43. 2026-08-01 04:16 UTCEPSS rescore
  44. 2026-07-30 16:28 UTCEPSS rescore
  45. 2026-07-30 01:30 UTCEPSS rescore
  46. 2026-07-27 14:13 UTCEPSS rescore
  47. 2026-07-27 12:51 UTCEG score recompute
  48. 2026-07-27 12:51 UTCVendor advisory
  49. 2026-07-27 12:50 UTCOSV refresh

Frequently asked(5)

What is CVE-2026-33056?
CVE-2026-33056 is a medium vulnerability published on March 20, 2026. tar-rs is a tar archive reading/writing library for Rust. In versions 0.4.44 and below, when unpacking a tar archive, the tar crate's unpack_dir function uses fs::metadata() to check whether a path that already exists is a directory. Because fs::metadata() follows symbolic links, a crafted tarball…
When was CVE-2026-33056 disclosed?
CVE-2026-33056 was first published in the National Vulnerability Database on March 20, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33056 actively exploited?
CVE-2026-33056 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 68.2% of all scored CVEs.
What is the CVSS score of CVE-2026-33056?
CVE-2026-33056 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-33056?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33056, 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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