CVE-2026-33055

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 67% 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
Elevated
8.1EG
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: 8.1Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

tar-rs is a tar archive reading/writing library for Rust. Versions 0.4.44 and below have conditional logic that skips the PAX size header in cases where the base header size is nonzero. As part of CVE-2025-62518, the astral-tokio-tar project was changed to correctly honor PAX size headers in the case where it was different from the base header. This is almost the inverse of the astral-tokio-tar issue. Any discrepancy in how tar parsers honor file size can be used to create archives that appear differently when unpacked by different archivers. In this case, the tar-rs (Rust tar) crate is an outlier in checking for the header size - other tar parsers (including e.g. Go archive/tar) unconditionally use the PAX size override. This can affect anything that uses the tar crate to parse archives and expects to have a consistent view with other parsers. This issue has been fixed in version 0.4.45.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
67
EG Risk 67/100

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
Severity81% × 45%
Exploitation40% × 40%
Automatability100% × 15%
EPSS PROB
0.5%
EPSS %ILE
39th
KEV
Not listed

Published

March 20, 2026

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Aug 2, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
generic
https://www.cve.org/CVERecord?id=CVE-2025-62518
githubMentions a patch (unverified)🟡 PoC Available

tar-rs incorrectly ignores PAX size headers if header size is nonzero · Advisory · composefs/tar-rs · GitHub

https://github.com/alexcrichton/tar-rs/security/advisories/GHSA-gchp-q4r4-x4ff
github_commit Patch Available

commit de1a5870e603 (alexcrichton/tar-rs)

Patch available: alexcrichton/tar-rs 0.4.46 (contains commit de1a5870e603)

https://github.com/alexcrichton/tar-rs/commit/de1a5870e603758f430073688691165f21a33946

Vendor Advisories for CVE-2026-33055(2)

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

Affected Packages

(9 across 5 ecosystems)
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
rustc1.48.0+dfsg1-2 ... 1.96.0+dfsg1-1~exp1 (200 versions)
  • every version on: no fix on record
—
rust-tar0.4.26-1 ... 0.4.45-2 (14 versions)
  • every version on: no fix on record
—
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
rustc1.63.0+dfsg1-2 ... 1.96.1+dfsg1-1 (146 versions)
  • every version on: no fix on record
—
rust-tar0.4.38-1 ... 0.4.46-1 (11 versions)
  • every version on: no fix on record
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
rustc1.85.0+dfsg3-1
  • every version up to 1.85.1+dfsg1-1+deb13u1: fixed in 1.85.1+dfsg1-1+deb13u1
—
rust-tar0.4.43-4, 0.4.44-1, 0.4.45-1, 0.4.45-2, 0.4.46-1
  • every version on: no fix on record
—
Debian:14(2)
PackageVulnerable rangeFix by version rangeDependents
rustc1.85.0+dfsg3-1 ... 1.92.0+dfsg1-2~bpo13+1 (34 versions)
  • every version up to 1.92.0+dfsg1-2: fixed in 1.92.0+dfsg1-2
—
rust-tar0.4.43-4, 0.4.44-1
  • every version up to 0.4.45-1: fixed in 0.4.45-1
—
crates.io(1)
PackageVulnerable rangeFix by version rangeDependents
tar—
  • every version up to 0.4.45: fixed in 0.4.45
  • 0.0.0-0 up to 0.4.45: fixed in 0.4.45
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 24× 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 195 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-33055?
CVE-2026-33055 is a high vulnerability published on March 20, 2026. tar-rs is a tar archive reading/writing library for Rust. Versions 0.4.44 and below have conditional logic that skips the PAX size header in cases where the base header size is nonzero. As part of CVE-2025-62518, the astral-tokio-tar project was changed to correctly honor PAX size headers in the…
When was CVE-2026-33055 disclosed?
CVE-2026-33055 was first published 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-2026-33055 actively exploited?
CVE-2026-33055 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-2026-33055?
CVE-2026-33055 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-33055?
A fix for CVE-2026-33055 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-33055 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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